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8042600: Add more samples in nashorn/samples directory

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Reviewed-by: jlaskey, hannesw
This commit is contained in:
Athijegannathan Sundararajan 2014-05-07 20:20:58 +05:30
parent b705fef9d6
commit f7e89ae474
54 changed files with 3364 additions and 51 deletions
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110
nashorn/samples/BufferArray.java Normal file
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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import jdk.nashorn.api.scripting.AbstractJSObject;
import java.nio.DoubleBuffer;
/**
* Simple class demonstrating pluggable script object
* implementation. By implementing jdk.nashorn.api.scripting.JSObject
* (or extending AbstractJSObject which implements it), you
* can supply a friendly script object. Nashorn will call
* 'magic' methods on such a class on 'obj.foo, obj.foo = 33,
* obj.bar()' etc. from script.
*
* In this example, Java nio DoubleBuffer object is wrapped
* as a friendly script object that provides indexed acces
* to buffer content and also support array-like "length"
* readonly property to retrieve buffer's capacity. This class
* also demonstrates a function valued property called "buf".
* On 'buf' method, we return the underlying nio buffer object
* that is being wrapped.
*/
public class BufferArray extends AbstractJSObject {
// underlying nio buffer
private final DoubleBuffer buf;
public BufferArray(int size) {
buf = DoubleBuffer.allocate(size);
}
public BufferArray(DoubleBuffer buf) {
this.buf = buf;
}
// called to check if indexed property exists
@Override
public boolean hasSlot(int index) {
return index > 0 && index < buf.capacity();
}
// get the value from that index
@Override
public Object getSlot(int index) {
return buf.get(index);
}
// set the value at that index
@Override
public void setSlot(int index, Object value) {
buf.put(index, ((Number)value).doubleValue());
}
// do you have a property of that given name?
@Override
public boolean hasMember(String name) {
return "length".equals(name) || "buf".equals(name);
}
// get the value of that named property
@Override
public Object getMember(String name) {
switch (name) {
case "length":
return buf.capacity();
case "buf":
// return a 'function' value for this property
return new AbstractJSObject() {
@Override
public Object call(Object thiz, Object... args) {
return BufferArray.this.buf;
}
// yes, I'm a function !
@Override
public boolean isFunction() {
return true;
}
};
}
return null;
}
}

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple java example with type casts.
// see javacastcounter.js.
class CastExample {
public final static int I = (int)23.33;
public final String str = (String)"hello";
}

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Simple Nashorn examples that can be run with "jjs" tool.

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nashorn/samples/array_mapreduce.js Normal file
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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Usage: jjs array_mapreduce.js
// Many Array.prototype functions such as map,
// filter, reduce, reduceRight, every, some are generic.
// These functions accept ECMAScript array as well as
// many array-like objects including java arrays.
// So, you can do map/filter/reduce with Java streams or
// you can also use Array.prototype functions as below.
// See also http://en.wikipedia.org/wiki/MapReduce
var DoubleArray = Java.type("double[]");
var StringArray = Java.type("java.lang.String[]");
var map = Array.prototype.map;
var filter = Array.prototype.filter;
var reduce = Array.prototype.reduce;
var jarr = new StringArray(5);
jarr[0] = "nashorn";
jarr[1] = "ecmascript";
jarr[2] = "javascript";
jarr[3] = "js";
jarr[4] = "scheme";
// sum of word lengths
print("Sum word length:",
reduce.call(
map.call(jarr, function(x) x.length),
function(x, y) x + y)
);
// another array example involving numbers
jarr = new DoubleArray(10);
// make random array of numbers
for (var i = 0; i < jarr.length; i++)
jarr[i] = Math.random();
var forEach = Array.prototype.forEach;
// print numbers in the array
forEach.call(jarr, function(x) print(x));
// print sum of squares of the random numbers
print("Square sum:",
reduce.call(
map.call(jarr, function(x) x*x),
function(x, y) x + y)
);

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#// Usage: jjs -scripting -fx astviewer.js -- <scriptfile>
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
if (!$OPTIONS._fx) {
print("Usage: jjs -scripting -fx astviewer.js -- <.js file>");
exit(1);
}
// Using JavaFX from Nashorn. See also:
// http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html
// This example shows AST of a script file as a JavaFX
// tree view in a window. If no file is specified, AST of
// this script file is shown. This script demonstrates
// 'load' function, JavaFX support by -fx, readFully function
// in scripting mode.
// JavaFX classes used
var StackPane = Java.type("javafx.scene.layout.StackPane");
var Scene = Java.type("javafx.scene.Scene");
var TreeItem = Java.type("javafx.scene.control.TreeItem");
var TreeView = Java.type("javafx.scene.control.TreeView");
// Create a javafx TreeItem to view a AST node
function treeItemForASTNode(ast, name) {
var item = new TreeItem(name);
for (var prop in ast) {
var node = ast[prop];
if (typeof node == 'object') {
if (node == null) {
// skip nulls
continue;
}
if (Array.isArray(node) && node.length == 0) {
// skip empty arrays
continue;
}
var subitem = treeItemForASTNode(node, prop);
} else {
var subitem = new TreeItem(prop + ": " + node);
}
item.children.add(subitem);
}
return item;
}
// do we have a script file passed? if not, use current script
var sourceName = arguments.length == 0? __FILE__ : arguments[0];
// load parser.js from nashorn resources
load("nashorn:parser.js");
// read the full content of the file and parse it
// to get AST of the script specified
var ast = parse(readFully(sourceName));
// JavaFX start method
function start(stage) {
stage.title = "AST Viewer";
var rootItem = treeItemForASTNode(ast, sourceName);
var tree = new TreeView(rootItem);
var root = new StackPane();
root.children.add(tree);
stage.scene = new Scene(root, 300, 450);
stage.show();
}

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#// Usage: jjs -fx barchart_weather.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Example that retrieves weather data from a URL in JSON
// format and draws bar chart using JavaFX
// -fx check
if (! $OPTIONS._fx) {
print("Usage: jjs -fx barchart_weather.js");
exit(1);
}
// Java classes used
var URL = Java.type("java.net.URL");
var BufferedReader = Java.type("java.io.BufferedReader");
var InputStreamReader = Java.type("java.io.InputStreamReader");
// function to retrieve text content of the given URL
function readTextFromURL(url) {
var str = '';
var u = new URL(url);
var reader = new BufferedReader(
new InputStreamReader(u.openStream()));
try {
reader.lines().forEach(function(x) str += x);
return str;
} finally {
reader.close();
}
}
// change URL for your city here!
var url = "http://api.openweathermap.org/data/2.5/forecast?q=chennai,india&units=metric&mode=json";
// download JSON document and parse
var json = readTextFromURL(url);
var weather = JSON.parse(json);
// View JSON of this using site such as http://www.jsoneditoronline.org/ to know
// about the JSON data format used by this site
// Extracted data from the json object
var temp = weather.list.map(function(x) x.main.temp);
var temp_min = weather.list.map(function(x) x.main.temp_min);
var temp_max = weather.list.map(function(x) x.main.temp_max);
var date = weather.list.map(function(x) x.dt_txt);
// JavaFX classes used
var Scene = Java.type("javafx.scene.Scene");
var BarChart = Java.type("javafx.scene.chart.BarChart");
var CategoryAxis = Java.type("javafx.scene.chart.CategoryAxis");
var NumberAxis = Java.type("javafx.scene.chart.NumberAxis");
var XYChart = Java.type("javafx.scene.chart.XYChart");
function start(stage) {
stage.title="Chennai Weather Bar Chart";
var xAxis = new CategoryAxis();
xAxis.label = "date/time";
var yAxis = new NumberAxis();
yAxis.label = "temp in C";
var bc = new BarChart(xAxis, yAxis);
// 3 bars per datetime item - temp, min temp and max temp
var s1 = new XYChart.Series();
s1.name = "temp";
for (d in date) {
s1.data.add(new XYChart.Data(date[d], temp[d]));
}
var s2 = new XYChart.Series();
s2.name = "min temp";
for (d in date) {
s2.data.add(new XYChart.Data(date[d], temp_min[d]));
}
var s3 = new XYChart.Series();
s3.name = "max temp";
for (d in date) {
s3.data.add(new XYChart.Data(date[d], temp_max[d]));
}
bc.data.addAll(s1, s2, s3);
stage.scene = new Scene(bc, 800, 600);
stage.show();
}

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// nashorn allows you treat every Java8 lambda as a function
var JFunction = Java.type("java.util.function.Function");
var obj = new JFunction() {
apply: function(x) {
print(x + ", lambda");
}
};
// prints 'function'
print(typeof obj);
// call it!
obj("hello");

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nashorn/samples/counters.js
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/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -33,7 +33,11 @@
* This file can be run along with any script you want to run
* to print aggregate stat counters from nashorn.
*
* Usage: jjs <your-file.js> counters.js
* Usage: jjs -J-Dnashorn.debug <your-file.js> counters.js
*/
Debug.dumpCounters();
if (java.lang.System.getProperty("nashorn.debug") == null) {
print("Usage: jjs -J-Dnashorn.debug <your-file.js> counters.js");
} else {
Debug.dumpCounters();
}

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// __DIR__ variable is equivalent of `dirname $0` in
// shell scripts - expands to the directory where
// the current script is located.
print("This script is in the directory: " + __DIR__);

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Usage: jjs disassemble.js -- <.class-file-path>
// Simple .class disassembler that uses bundled ObjectWeb ASM
// classes in jdk8. WARNING: Bundled ObjectWeb ASM classes are
// not part of official jdk8 API. It can be changed/removed
// without notice. So, this script is brittle by design!
// This example demonstrates passing arguments to script
// from jjs command line, nio and ASM usage.
// classes used
var FileSystems = Java.type("java.nio.file.FileSystems");
var Files = Java.type("java.nio.file.Files");
var System = Java.type("java.lang.System");
var PrintWriter = Java.type("java.io.PrintWriter");
// WARNING: uses non-API classes of jdk8!
var ClassReader = Java.type("jdk.internal.org.objectweb.asm.ClassReader");
var TraceClassVisitor = Java.type("jdk.internal.org.objectweb.asm.util.TraceClassVisitor");
// convert file name to Path instance
function path(file) {
return FileSystems.default.getPath(file);
}
// read all file content as a byte[]
function readAllBytes(file) {
return Files.readAllBytes(path(file));
}
// disassemble .class byte[] and prints output to stdout
function disassemble(bytecode) {
var pw = new PrintWriter(System.out);
new ClassReader(bytecode).accept(new TraceClassVisitor(pw), 0);
}
// check for command line arg (for .class file name)
if (arguments.length == 0 || !arguments[0].endsWith('.class')) {
print("Usage: jjs disassemble -- <.class file>");
exit(1);
}
// disassemble the given .class file
disassemble(readAllBytes(arguments[0]));

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Using javax.script engine API of nashorn from script!

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple example showing global variable access from caller
var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
// create manager
var manager = new ScriptEngineManager();
// create engine
var engine = manager.getEngineByName("js");
// eval code!
engine.eval("x = 'hello'");
// access global var from engine
print(engine.get('x'));

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// simple example showing how to call a global script
// function from caller
var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
// create manager
var manager = new ScriptEngineManager();
// create engine
var engine = manager.getEngineByName("js");
// eval code!
engine.eval("function func(name) { print('I am func, hello ' + name) }");
// invoke functions, methods of code evaluated by engine
// from javax.script.Invocable interface. But, hey,
// calling code is JavaScript and don't worry about types :)
engine.invokeFunction("func", "Nashorn");

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#// Usage: jjs -scripting callmethod.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// simple example demonstrating calling a script object
// method from script engine user code
var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
// create manager
var manager = new ScriptEngineManager();
// create engine
var engine = manager.getEngineByName("js");
// eval code - too many script escapes?
// use heredoc !
engine.eval(<<CODE
var obj = {
func: function() {
print("I am func of " + this);
},
toString: function() {
return "Object 'obj'";
}
};
CODE);
// invoke methods of an object in script world
// from javax.script.Invocable interface. But, hey,
// calling code is JavaScript and don't worry about types :)
// get that script object on which to call a method
var scriptObj = engine.get("obj");
// call 'func' method on object 'obj'
engine.invokeMethod(scriptObj, "func");

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Example showing how to expose a script global var from caller
var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
// create manager
var manager = new ScriptEngineManager();
// create engine
var engine = manager.getEngineByName("js");
// expose variable to engine
engine.put("name", "Nashorn");
// access it from script
engine.eval("print('Hello, ' + name)");

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#// Usage: jjs -scripting foreignobject.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// cross nashorn engine scripting
// access script objects from other engines in natural syntax
var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
// create manager
var manager = new ScriptEngineManager();
// create engine
var engine = manager.getEngineByName("js");
// eval code!
engine.eval(<<CODE
var obj = {
foo: 42,
func: function() {
print("func: " + this.foo);
}
};
CODE);
// Nashorn engine returns script objects as instance of
// the class jdk.nashorn.api.scripting.ScriptObjectMirror
// But nashorn's dynalink linker can treat these objects
// specially to support natural script syntax to access..
// In Java code, you need to use ScriptObjectMirror's
// methods though. Once again, script world is simpler :-)
var foreignObj = engine.get("obj");
// access properties, functions of it
// with natural syntax
print(foreignObj.foo);
foreignObj.func();
print(typeof foreignObj.func);
// access engine's global
var foreignGlobal = engine.eval("this");
// create objects in engine's world from here!
print(new foreignGlobal.Object());
print(new foreignGlobal.Date());

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple hello world example showing create engine
// and eval simple script
var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
// create manager
var manager = new ScriptEngineManager();
// create engine
var engine = manager.getEngineByName("js");
// eval code!
engine.eval("print('hello world')");

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#// Usage: jjs -scripting interface.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Example demonstrating how to implement a Java interface
// whose methods are backed by global script functions
var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
// create manager
var manager = new ScriptEngineManager();
// create engine
var engine = manager.getEngineByName("js");
// eval code - too many script escapes?
// use heredoc !
engine.eval(<<CODE
function run() {
print("run global function called");
}
CODE);
// create Java interface object whose methods are
// implemented by script functions. This is from
// javax.script.Invocable. But we are in JS world,
// don't worry about types :)
var Runnable = Java.type("java.lang.Runnable");
var r = engine.getInterface(Runnable.class);
print(r.class);
r.run();

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#// Usage: jjs -scripting interface2.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple example demonstrating how to implement java interface
// whose methods are backed by script methods of a script object
var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
// create manager
var manager = new ScriptEngineManager();
// create engine
var engine = manager.getEngineByName("js");
// eval code - too many script escapes?
// use heredoc !
engine.eval(<<CODE
var obj = {
run: function() {
print("I am run method of 'obj'");
}
};
CODE);
// create Java interface object whose methods are
// implemented by script methods of a script object
// This is from javax.script.Invocable. But we are
// in JS world, don't worry about types :)
var Runnable = Java.type("java.lang.Runnable");
var scriptObj = engine.get("obj");
var r = engine.getInterface(scriptObj, Runnable.class);
print(r.class);
r.run();

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple example demonstrating how to expose 'function's
// from embedding code. Any lambda object exposed to engine
// can be called as 'function' in script.
var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
// create manager
var manager = new ScriptEngineManager();
// create engine
var engine = manager.getEngineByName("js");
// Any lambda (@FunctionalInterface annotated type) object can be
// be exposed from script embedding code. Script can call
// it as a function
engine.put("upper", new java.util.function.Function() {
apply: function(x) x.toUpperCase()
});
print(engine.eval("upper('hello')"));

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#// Usage: jjs -scripting env.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// In nashorn -scripting mode,
// "$ENV" object exposes process
// environment variables
print($ENV.PATH);
print($ENV.JAVA_HOME);
for (i in $ENV) {
print(i, "->", $ENV[i]);
}

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// nashorn supports expression closures extension of
// Mozilla JavaScript 1.8. See also
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_in_JavaScript/1.8
// leave {, } and 'return' keyword
function sqr(x) x*x;
// prints 289 (= 17*17)
print(sqr(17));

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// nashorn supports pseudo global variables __FILE__
// and __LINE__ that expands to currently executed
// script file name and current script line number
// prints current file and line number
print("executing " + __FILE__ + " @ " + __LINE__);

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// What is FizzBuzz? http://c2.com/cgi/wiki?FizzBuzzTest
// Yet another FizzBuzz impl. using Java 8 lambda and stream
// but using Nashorn. This is ECMAScript port of @stuartmarks'
// Java implementation
var IntStream = Java.type("java.util.stream.IntStream");
function ifmod(m, r, f) {
return function(i) { return i % m == 0? r : f(i); }
}
// pass script function for lambda
IntStream.rangeClosed(1, 100).
mapToObj(
ifmod(15, "FizzBuzz", ifmod(5, "Buzz", ifmod(3, "Fizz", String))))
.forEach(print);

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// nashorn supports for..each extension supported
// by Mozilla. See also
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for_each...in
var strs = [ "hello", "world" ];
for each (str in strs)
print(str);
// create a java int[] object
var JArray = Java.type("int[]");
var arr = new JArray(10);
// store squares as values
for (i in arr)
arr[i] = i*i;
// for .. each on java arrays
print("squares");
for each (i in arr)
print(i);
var System = Java.type("java.lang.System");
// for..each on java Iterables
// print System properties as name = value pairs
print("System properties");
for each (p in System.properties.entrySet()) {
print(p.key, "=", p.value);
}
// print process environment vars as name = value pairs
print("Process environment");
for each (e in System.env.entrySet()) {
print(e.key, "=", e.value);
}

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// print 100 Guassian distributed numbers
var Random = Java.type("java.util.Random");
var DoubleStream = Java.type("java.util.stream.DoubleStream");
var r = new Random();
// expression closure (see expression_closure.js as well)
// passed as lambda double generator. "print" passed as
// double consumer lambda to 'forEach' method.
DoubleStream
.generate(function() r.nextGaussian())
.limit(100)
.forEach(print);

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// print 100 Guassian distributed numbers
var Random = Java.type("java.util.Random");
var DoubleStream = Java.type("java.util.stream.DoubleStream");
// function as lambda double generator. "print" passed as
// double consumer lambda to 'forEach' method.
// Function.prototype.bind used to attach 'state' for the
// generator function.
DoubleStream
.generate(
function(r) {
return r.nextGaussian()
}.bind(this, new Random()))
.limit(100)
.forEach(print);

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#// Usage: jjs -scripting gutenberg.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple example that demonstrates reading XML Rss feed
// to generate a HTML file from script and show it by browser
// Java classes used
var Characters = Java.type("javax.xml.stream.events.Characters");
var Factory = Java.type("javax.xml.stream.XMLInputFactory");
var File = Java.type("java.io.File");
var FileWriter = Java.type("java.io.FileWriter");
var PrintWriter = Java.type("java.io.PrintWriter");
var URL = Java.type("java.net.URL");
// read Rss feed from a URL. Returns an array
// of objects having only title and link properties
function readRssFeed(url) {
var fac = Factory.newInstance();
var reader = fac.createXMLEventReader(url.openStream());
// get text content from next event
function getChars() {
var result = "";
var e = reader.nextEvent();
if (e instanceof Characters) {
result = e.getData();
}
return result;
}
var items = [];
var title, link;
var inItem = false;
while (reader.hasNext()) {
var evt = reader.nextEvent();
if (evt.isStartElement()) {
var local = evt.name.localPart;
if (local == "item") {
// capture title, description now
inItem = true;
}
if (inItem) {
switch (local) {
case 'title':
title = getChars();
break;
case 'link':
link = getChars();
break;
}
}
} else if (evt.isEndElement()) {
var local = evt.name.localPart;
if (local == "item") {
// one item done, save it in result array
items.push({ title: title, link: link });
inItem = false;
}
}
}
return items;
}
// generate simple HTML for an RSS feed
function getBooksHtml() {
var url = new URL("http://www.gutenberg.org/cache/epub/feeds/today.rss");
var items = readRssFeed(url);
var str = "<ul>";
// Nashorn's string interpolation and heredoc
// support is very handy in generating text content
// that is filled with elements from runtime objects.
// We insert title and link in <li> elements here.
for each (i in items) {
str += <<EOF
<li>
<a href="${i.link}">${i.title}</a>
</li>
EOF
}
str += "</ul>";
return str;
}
// write the string to the given file
function writeTo(file, str) {
var w = new PrintWriter(new FileWriter(file));
try {
w.print(str);
} finally {
w.close();
}
}
// generate books HTML
var str = getBooksHtml();
// write to file. __DIR__ is directory where
// this script is stored.
var file = new File(__DIR__ + "books.html");
writeTo(file, str);
// show it by desktop browser
try {
var Desktop = Java.type("java.awt.Desktop");
Desktop.desktop.browse(file.toURI());
} catch (e) {
print(e);
}

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#// Usage: jjs -scripting heredoc.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Nashorn supports Shell script like here-documents
// in -scripting mode. Here-docs are multi-line strings
// that are possibly interpolated with ${} expressions
// See also http://en.wikipedia.org/wiki/Here_document
var sender = "Buffy the Vampire Slayer";
var recipient = "Spike";
print(<<END
Dear ${recipient},
I wish you to leave Sunnydale and never return.
Not Quite Love,
${sender}
END);

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// nashorn supports Java interface implementation
// by script using anonymous class-like syntax
var Runnable = Java.type("java.lang.Runnable");
var Thread = Java.type("java.lang.Thread");
// use anonymous class-like new syntax
var r = new Runnable() {
run: function() {
print("I am a runnable " + Thread.currentThread());
}
}
r.run();
var t = new Thread(r);
t.start();
t.join();

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#// Usage: jjs -fx javaastviewer.js -- <.java files>
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This example demonstrates Java subclassing by Java.extend
// and javac Compiler and Tree API. This example also uses
// -fx and javafx TreeView to visualize Java AST as TreeView
if (!$OPTIONS._fx || arguments.length == 0) {
print("Usage: jjs -fx javaastviewer.js -- <.java files>");
exit(1);
}
// Java types used
var Enum = Java.type("java.lang.Enum");
var HashSet = Java.type("java.util.HashSet");
var Name = Java.type("javax.lang.model.element.Name");
var List = Java.type("java.util.List");
var Set = Java.type("java.util.Set");
var SimpleTreeVisitor = Java.type("com.sun.source.util.SimpleTreeVisitor");
var StringArray = Java.type("java.lang.String[]");
var ToolProvider = Java.type("javax.tools.ToolProvider");
var Tree = Java.type("com.sun.source.tree.Tree");
function javaASTToScriptObject(args) {
// properties ignored (javac implementation class properties) in AST view.
// may not be exhaustive - any getAbc would become "abc" property or
// public field becomes a property of same name.
var ignoredProps = new HashSet();
for each (var word in
['extending', 'implementing', 'init', 'mods', 'clazz', 'defs',
'expr', 'tag', 'preferredPosition', 'qualid', 'recvparam',
'restype', 'params', 'startPosition', 'thrown',
'tree', 'typarams', 'typetag', 'vartype']) {
ignoredProps.add(word);
}
// get the system compiler tool
var compiler = ToolProvider.systemJavaCompiler;
// get standard file manager
var fileMgr = compiler.getStandardFileManager(null, null, null);
// make a list of compilation unit from command line argument file names
// Using Java.to convert script array (arguments) to a Java String[]
var compUnits = fileMgr.getJavaFileObjects(Java.to(args, StringArray));
// create a new compilation task
var task = compiler.getTask(null, fileMgr, null, null, null, compUnits);
// subclass SimpleTreeVisitor - converts Java AST node to
// a simple script object by walking through it
var ConverterVisitor = Java.extend(SimpleTreeVisitor);
var visitor = new ConverterVisitor() {
// convert java AST node to a friendly script object
// which can be viewed. Every node ends up in defaultAction
// method of SimpleTreeVisitor method.
defaultAction: function (node, p) {
var resultObj = {};
// Nashorn does not iterate properties and methods of Java objects
// But, we can bind properties of any object (including java objects)
// to a script object and iterate it!
var obj = {};
Object.bindProperties(obj, node);
// we don't want every property, method of java object
for (var prop in obj) {
var val = obj[prop];
var type = typeof val;
// ignore 'method' members
if (type == 'function' || type == 'undefined') {
continue;
}
// ignore properties from Javac implementation
// classes - hack by name!!
if (ignoredProps.contains(prop)) {
continue;
}
// subtree - recurse it
if (val instanceof Tree) {
resultObj[prop] = visitor.visit(val, p);
} else if (val instanceof List) {
// List of trees - recurse each and make an array
var len = val.size();
if (len != 0) {
var arr = [];
for (var j = 0; j < len; j++) {
var e = val[j];
if (e instanceof Tree) {
arr.push(visitor.visit(e, p));
}
}
resultObj[prop] = arr;
}
} else if (val instanceof Set) {
// Set - used for modifier flags
// make array
var len = val.size();
if (len != 0) {
var arr = [];
for each (var e in val) {
if (e instanceof Enum || typeof e == 'string') {
arr.push(e.toString());
}
}
resultObj[prop] = arr;
}
} else if (val instanceof Enum || val instanceof Name) {
// make string for any Enum or Name
resultObj[prop] = val.toString();
} else if (type != 'object') {
// primitives 'as is'
resultObj[prop] = val;
}
}
return resultObj;
}
}
// top level object with one property for each compilation unit
var scriptObj = {};
for each (var cu in task.parse()) {
scriptObj[cu.sourceFile.name] = cu.accept(visitor, null);
}
return scriptObj;
}
// JavaFX classes used
var StackPane = Java.type("javafx.scene.layout.StackPane");
var Scene = Java.type("javafx.scene.Scene");
var TreeItem = Java.type("javafx.scene.control.TreeItem");
var TreeView = Java.type("javafx.scene.control.TreeView");
// Create a javafx TreeItem to view a script object
function treeItemForObject(obj, name) {
var item = new TreeItem(name);
for (var prop in obj) {
var node = obj[prop];
if (typeof node == 'object') {
if (node == null) {
// skip nulls
continue;
}
var subitem = treeItemForObject(node, prop);
} else {
var subitem = new TreeItem(prop + ": " + node);
}
item.children.add(subitem);
}
item.expanded = true;
return item;
}
var commandArgs = arguments;
// JavaFX start method
function start(stage) {
var obj = javaASTToScriptObject(commandArgs);
stage.title = "Java AST Viewer"
var rootItem = treeItemForObject(obj, "AST");
rootItem.expanded = true;
var tree = new TreeView(rootItem);
var root = new StackPane();
root.children.add(tree);
stage.scene = new Scene(root, 300, 450);
stage.show();
}

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Usage: jjs javacastcounter.js -- <.java files>
// This example demonstrates Nashorn Java.extend API
// to subclass a Java class from script.
// This example uses Javac Compiler and Tree API
// to list type casts used in java source files.
if (arguments.length == 0) {
print("Usage: jjs javacastcounter.js -- <.java files>");
exit(1);
}
// Java types used
var ToolProvider = Java.type("javax.tools.ToolProvider");
var TreeScanner = Java.type("com.sun.source.util.TreeScanner");
var Trees = Java.type("com.sun.source.util.Trees");
var StringArray = Java.type("java.lang.String[]");
// get the system compiler tool
var compiler = ToolProvider.systemJavaCompiler;
// get standard file manager
var fileMgr = compiler.getStandardFileManager(null, null, null);
// make a list of compilation unit from command line argument file names
// Using Java.to convert script array (arguments) to a Java String[]
var compUnits = fileMgr.getJavaFileObjects(Java.to(arguments, StringArray));
// create a new compilation task
var task = compiler.getTask(null, fileMgr, null, null, null, compUnits);
// SourcePositions object to get positions of AST nodes
var sourcePositions = Trees.instance(task).sourcePositions;
// Subclass TreeScanner class
var CastCounter = Java.extend(TreeScanner);
var counter = new CastCounter() {
// current CompilationUnitTree
compUnit: null,
// current LineMap (pos -> line, column)
lineMap: null,
// current compilation unit's file name
fileName: null,
// overrides of TreeScanner methods
visitCompilationUnit: function(node, p) {
// capture info about current Compilation unit
this.compUnit = node;
this.lineMap = node.lineMap;
this.fileName = node.sourceFile.name;
// Using Java.super API to call super class method here
return Java.super(counter).visitCompilationUnit(node, p);
},
visitTypeCast: function(node, p) {
// print information on this type cast node
var pos = sourcePositions.getStartPosition(this.compUnit, node);
var line = this.lineMap.getLineNumber(pos);
var col = this.lineMap.getColumnNumber(pos);
print(node + " @ " + this.fileName + ":" + line + ":" + col);
// count one more type cast
return 1;
},
reduce: function(r1, r2) {
return (r1 == null ? 0 : r1) + (r2 == null ? 0 : r2);
}
};
// print total number of type cast nodes seen
print("Total casts:", counter.scan(task.parse(), null));

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// JavaImporter along with 'with' statement helps in
// localized Java class references
function readTextFromURL(url) {
// equivalent to
//
// import java.io.*;
// import java.net.*;
// import java.lang.StringBuffer;
//
// only inside the 'with' statement
with (new JavaImporter(java.io,
java.net,
java.lang.StringBuilder)) {
var buf = new StringBuilder();
var u = new URL(url);
var reader = new BufferedReader(
new InputStreamReader(u.openStream()));
var line = null;
try {
while ((line = reader.readLine()) != null)
buf.append(line).append('\n');
} finally {
reader.close();
}
return buf.toString();
}
}
print(readTextFromURL("https://twitter.com/"));

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Java List elements accessed/modified via
// array element access/update syntax
var ArrayList = Java.type("java.util.ArrayList");
var list = new ArrayList();
// add elements to list by List's add method calls
list.add("js");
list.add("ecmascript");
list.add("nashorn");
// get by List's get(int) method
print(list[0]);
print(list[1]);
print(list[2]);
// access list elements by indexed access as well
print(list[0]);
print(list[1]);
print(list[2]);
// assign to list elements by index as well
list[0] = list[0].toUpperCase();
list[1] = list[1].toUpperCase();
list[2] = list[2].toUpperCase();
print(list.get(0));
print(list.get(1));
print(list.get(2));
print(list[0]);
print(list[1]);
print(list[2]);

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Java Map keys as properties
// Demonstrating Java Map key/value can be accessed
// as property/value from script.
var HashMap = Java.type("java.util.HashMap");
var map = new HashMap();
// map key-value access by java get/put method calls
map.put('js', 'nashorn');
print(map.get('js'));
// access keys of map as properties
print(map['js']);
print(map.js);
// also assign new key-value pair
// as 'property-value'
map['language'] = 'java';
print(map.get("language"));
print(map.language);
print(map['language']);
map.answer = 42;
print(map.get("answer"));
print(map.answer);
print(map['answer']);

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#// Usage: jjs -scripting javashell.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple Java "shell" with which you can try out
// your few liner Java code leaving imports, main etc.
// And you can leave even compilation as this script
// takes care boilerplate+compile step for you.
// Java types used
var Arrays = Java.type("java.util.Arrays");
var BufferedReader = Java.type("java.io.BufferedReader");
var FileWriter = Java.type("java.io.FileWriter");
var LocalDateTime = Java.type("java.time.LocalDateTime");
var InputStreamReader = Java.type("java.io.InputStreamReader");
var PrintWriter = Java.type("java.io.PrintWriter");
var ProcessBuilder = Java.type("java.lang.ProcessBuilder");
var System = Java.type("java.lang.System");
// read multiple lines of input from stdin till user
// enters an empty line
function input(endMarker, prompt) {
if (!endMarker) {
endMarker = "";
}
if (!prompt) {
prompt = " >> ";
}
var str = "";
var reader = new BufferedReader(new InputStreamReader(System.in));
var line;
while (true) {
System.out.print(prompt);
line = reader.readLine();
if (line == null || line == endMarker) {
break;
}
str += line + "\n";
}
return str;
}
// write the string to the given file
function writeTo(file, str) {
var w = new PrintWriter(new FileWriter(file));
try {
w.print(str);
} finally {
w.close();
}
}
// generate Java code with user's input
// put inside generated main method
function generate(className) {
var usercode = input();
if (usercode == "") {
return false;
}
var fullcode = <<EOF
// userful imports, add more here if you want
// more imports.
import static java.lang.System.*;
import java.io.*;
import java.net.*;
import java.math.*;
import java.nio.file.*;
import java.time.*;
import java.time.chrono.*;
import java.time.format.*;
import java.time.temporal.*;
import java.time.zone.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.stream.*;
public class ${className} {
public static void main(String[] args) throws Exception {
${usercode}
}
}
EOF
writeTo("${className}.java", fullcode);
return true;
}
// execute code command
function exec(args) {
// build child process and start it!
new ProcessBuilder(Arrays.asList(args.split(' ')))
.inheritIO()
.start()
.waitFor();
}
// generate unique name
function uniqueName() {
var now = LocalDateTime.now().toString();
// replace unsafe chars with '_'
return "JavaShell" + now.replace(/-|:|\./g, '_');
}
// read-compile-run loop
while(true) {
var className = uniqueName();
if (generate(className)) {
exec("javac ${className}.java");
exec("java ${className}");
} else {
break;
}
}

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#// Usage: jjs -scripting jsadapter_dom.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple example that demonstrates reading XML Rss feed
// to generate a HTML file from script and show it by browser
// Uses XML DOM parser and DOM element wrapped by script
// "proxy" (JSAdapter constructor)
// Java classes used
var DocBuilderFac = Java.type("javax.xml.parsers.DocumentBuilderFactory");
var Node = Java.type("org.w3c.dom.Node");
var File = Java.type("java.io.File");
var FileWriter = Java.type("java.io.FileWriter");
var PrintWriter = Java.type("java.io.PrintWriter");
// constants from Node class
var ELEMENT_NODE = Node.ELEMENT_NODE;
var TEXT_NODE = Node.TEXT_NODE;
// parse XML from uri and return Document
function parseXML(uri) {
var docBuilder = DocBuilderFac.newInstance().newDocumentBuilder();
return docBuilder["parse(java.lang.String)"](uri);
}
// get child Elements of given name of the parent element given
function getChildElements(elem, name) {
var nodeList = elem.childNodes;
var childElems = [];
var len = nodeList.length;
for (var i = 0; i < len; i++) {
var node = nodeList.item(i);
if (node.nodeType == ELEMENT_NODE &&
node.tagName == name) {
childElems.push(wrapElement(node));
}
}
return childElems;
}
// get concatenated child text content of an Element
function getElemText(elem) {
var nodeList = elem.childNodes;
var len = nodeList.length;
var text = '';
for (var i = 0; i < len; i++) {
var node = nodeList.item(i);
if (node.nodeType == TEXT_NODE) {
text += node.nodeValue;
}
}
return text;
}
// Wrap DOM Element object as a convenient script object
// using JSAdapter. JSAdapter is like java.lang.reflect.Proxy
// in that it allows property access, method calls be trapped
// by 'magic' methods like __get__, __call__.
function wrapElement(elem) {
if (! elem) {
return elem;
}
return new JSAdapter() {
// getter to expose child elements and attributes by name
__get__: function(name) {
if (typeof name == 'string') {
if (name.startsWith('@')) {
var attr = elem.getAttributeNode(name.substring(1));
return !attr? undefined : attr.value;
}
var arr = getChildElements(elem, name);
if (arr.length == 1) {
// single child element, expose as single element
return arr[0];
} else {
// multiple children of given name, expose as array
return arr;
}
}
return undefined;
},
__call__: function(name) {
// toString override to get text content of this Element
if (name == 'toString' || name == 'valueOf') {
return getElemText(elem);
}
return undefined;
}
}
}
// generate HTML using here-doc and string interpolation
function getBooksHtml() {
var doc = parseXML("http://www.gutenberg.org/cache/epub/feeds/today.rss");
// wrap document root Element as script convenient object
var rss = wrapElement(doc.documentElement);
print("rss file version " + rss['@version']);
var str = <<HEAD
<html>
<title>${rss.channel.title}</title>
<body>
<h1>${rss.channel.description}</h1>
<p>
Published on ${rss.channel.pubDate}
</p>
HEAD
var items = rss.channel.item;
for each (var i in items) {
str += <<LIST
<dl>
<dt><a href="${i.link}">${i.title}</a></dt>
<dd>${i.description}</dd>
</dl>
LIST
}
str += <<END
</body>
</html>
END
return str;
}
// write the string to the given file
function writeTo(file, str) {
var w = new PrintWriter(new FileWriter(file));
try {
w.print(str);
} finally {
w.close();
}
}
// generate books HTML
var str = getBooksHtml();
// write to file. __DIR__ is directory where
// this script is stored.
var file = new File(__DIR__ + "books.html");
writeTo(file, str);
// show it by desktop browser
try {
var Desktop = Java.type("java.awt.Desktop");
Desktop.desktop.browse(file.toURI());
} catch (e) {
print(e);
}

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#// Usage: jjs -scripting -cp . jsobject.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This sample demonstrats how to expose a
// script friendly object from your java code
// by implementing jdk.nashorn.api.scripting.JSObject
// compile the java program
`javac BufferArray.java`;
// print error, if any and exit
if ($ERR != '') {
print($ERR);
exit($EXIT);
}
// create BufferArray
var BufferArray = Java.type("BufferArray");
var bb = new BufferArray(10);
// 'magic' methods called to retrieve set/get
// properties on BufferArray instance
var len = bb.length;
print("bb.length = " + len)
for (var i = 0; i < len; i++) {
bb[i] = i*i;
}
for (var i = 0; i < len; i++) {
print(bb[i]);
}
// get underlying buffer by calling a method
// on BufferArray magic object
// 'buf' is a function member
print(typeof bb.buf);
var buf = bb.buf();
// use retrieved underlying nio buffer
var cap = buf.capacity();
print("buf.capacity() = " + cap);
for (var i = 0; i < cap; i++) {
print(buf.get(i));
}

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#// Usage: jjs -scripting -cp . jsobject_mapreduce.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Many Array.prototype functions such as map,
// filter, reduce, reduceRight, every, some are generic.
// These functions accept ECMAScript array as well as
// many array-like objects including JSObjects.
// See also http://en.wikipedia.org/wiki/MapReduce
`javac BufferArray.java`;
var BufferArray = Java.type("BufferArray");
var buf = new BufferArray(10);
var map = Array.prototype.map;
var filter = Array.prototype.filter;
var reduce = Array.prototype.reduce;
// make random list of numbers
for (var i = 0; i < 10; i++)
buf[i] = Math.random();
var forEach = Array.prototype.forEach;
// print numbers in the list
forEach.call(buf, function(x) print(x));
// print sum of squares of the random numbers
print("Square sum:",
reduce.call(
map.call(buf, function(x) x*x),
function(x, y) x + y)
);

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#// Usage: jjs -fx jsonviewer.js
// or
// jjs -fx jsonviewer.js -- <url-of-json-doc>
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
if (! $OPTIONS._fx) {
print("Usage: jjs -fx jsonviewer.js -- <url-of-json-doc>");
exit(1);
}
// This example downloads a JSON file from a URL and
// shows the same as a JavaFX tree view.
// Using JavaFX from Nashorn. See also:
// http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html
// JavaFX classes used
var StackPane = Java.type("javafx.scene.layout.StackPane");
var Scene = Java.type("javafx.scene.Scene");
var TreeItem = Java.type("javafx.scene.control.TreeItem");
var TreeView = Java.type("javafx.scene.control.TreeView");
// read text content of a URL
function readTextFromURL(url) {
// equivalent to
//
// import java.io.*;
// import java.net.*;
// import java.lang.StringBuffer;
//
// only inside the 'with' statement
with (new JavaImporter(java.io,
java.net,
java.lang.StringBuilder)) {
var buf = new StringBuilder();
var u = new URL(url);
var reader = new BufferedReader(
new InputStreamReader(u.openStream()));
var line = null;
try {
while ((line = reader.readLine()) != null)
buf.append(line).append('\n');
} finally {
reader.close();
}
return buf.toString();
}
}
// Create a javafx TreeItem to view a script object
function treeItemForObject(obj, name) {
var item = new TreeItem(name);
for (var prop in obj) {
var node = obj[prop];
if (typeof node == 'object') {
if (node == null) {
// skip nulls
continue;
}
if (Array.isArray(node) && node.length == 0) {
// skip empty arrays
continue;
}
var subitem = treeItemForObject(node, prop);
} else {
var subitem = new TreeItem(prop + ": " + node);
}
item.children.add(subitem);
}
return item;
}
var DEFAULT_URL = "http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&amp;mode=json&amp;units=metric&amp;cnt=7`";
var url = arguments.length == 0? DEFAULT_URL : arguments[0];
var obj = JSON.parse(readTextFromURL(url));
// JavaFX start method
function start(stage) {
stage.title = "JSON Viewer";
var rootItem = treeItemForObject(obj, url);
var tree = new TreeView(rootItem);
var root = new StackPane();
root.children.add(tree);
stage.scene = new Scene(root, 300, 450);
stage.show();
}

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#// Usage: jjs -scripting letter.js -- <sender> <recipient>
/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
*

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Usage: jjs list_mapreduce.js
// Many Array.prototype functions such as map,
// filter, reduce, reduceRight, every, some are generic.
// These functions accept ECMAScript array as well as
// many array-like objects including java.util.ArrayLists.
// So, you can do map/filter/reduce with Java streams or
// you can also use Array.prototype functions as below.
// See also http://en.wikipedia.org/wiki/MapReduce
var ArrayList = Java.type("java.util.ArrayList");
var list = new ArrayList();
list.add("nashorn");
list.add("ecmascript");
list.add("javascript");
list.add("js");
list.add("scheme");
var map = Array.prototype.map;
var filter = Array.prototype.filter;
var reduce = Array.prototype.reduce;
// sum of word lengths
print("Sum word length:",
reduce.call(
map.call(list, function(x) x.length),
function(x, y) x + y)
);
// filter use to filter out "j*" and concatenate rest with ":"
// after uppercasing all strings
print(
reduce.call(
map.call(
filter.call(list, function(x) !x.startsWith("j")),
function(x) x.toUpperCase()),
function(x, y) x + ":" + y)
);
// another list example involving numbers
list.clear();
// make random list of numbers
for (var i = 0; i < 10; i++)
list.add(Math.random());
var forEach = Array.prototype.forEach;
// print numbers in the list
forEach.call(list, function(x) print(x));
// print sum of squares of the random numbers
print("Square sum:",
reduce.call(
map.call(list, function(x) x*x),
function(x, y) x + y)
);

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple program that lists available locals. This is ECMAScript
// port of Java example by @brunoborges
// Java classes used
var Arrays = Java.type("java.util.Arrays");
var Collectors = Java.type("java.util.stream.Collectors");
var JString = Java.type("java.lang.String");
var Locale = Java.type("java.util.Locale");
var formatStr = "Country : %s \t\t\t\t:\t Country Code : %s";
// Nashorn allows script functions to be passed
// whereever Java8 lambdas are expected.
// Nashorn also supports "expression closures" supported by
// Mozilla JavaScript 1.8 version. See also
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_in_JavaScript/1.8
// The following prints locales in (country) display name order
var list = Arrays.asList(Locale.getISOCountries())
.stream()
.map(function(x) new Locale("", x))
.sorted(function(c0, c1) c0.displayCountry.compareTo(c1.displayCountry))
.map(function(l) JString.format(formatStr, l.displayCountry, l.country))
.collect(Collectors.toList());
list.forEach(print);

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#// Usage: jjs -fx -scripting logisticmap.js -- <initial_x> <R>
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Logistic map viewer using Java8 Streams and JavaFX
// See also http://en.wikipedia.org/wiki/Logistic_map
if (!$OPTIONS._fx || arguments.length < 2) {
print("Usage: jjs -fx -scripting logisticmap.js -- <initial_x> <R>");
exit(1);
}
// parameters for the logistic map
var x = parseFloat(arguments[0]);
var R = parseFloat(arguments[1]);
var NUM_POINTS = arguments.length > 2? parseFloat(arguments[2]) : 20;
// Java classes used
var DoubleStream = Java.type('java.util.stream.DoubleStream');
var LineChart = Java.type("javafx.scene.chart.LineChart");
var NumberAxis = Java.type("javafx.scene.chart.NumberAxis");
var Scene = Java.type("javafx.scene.Scene");
var Stage = Java.type("javafx.stage.Stage");
var XYChart = Java.type("javafx.scene.chart.XYChart");
function start(stage) {
stage.title = "Logistic Map: initial x = ${x}, R = ${R}";
// make chart
var xAxis = new NumberAxis();
var yAxis = new NumberAxis();
var lineChart = new LineChart(xAxis, yAxis);
xAxis.setLabel("iteration");
yAxis.setLabel("x");
// make chart data series
var series = new XYChart.Series();
var data = series.data;
// populate data using logistic iteration
var i = 0;
DoubleStream
.generate(function() x = R*x*(1-x))
.limit(NUM_POINTS)
.forEach(
function(value) {
data.add(new XYChart.Data(i, value));
i++;
}
);
// add to stage
var scene = new Scene(lineChart, 800, 600);
lineChart.data.add(series);
stage.scene = scene;
stage.show();
}

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#// Usage: jjs -scripting options.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// print all option names and values
for (i in $OPTIONS) {
print(i, '=', $OPTIONS[i]);
}

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#// Usage: jjs -scripting greeting.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// readLine prints prompt and reads user response
var name = readLine("Your name please: ");
// user name is interpolated within string
print("Hello ${name}");

51
nashorn/samples/sam_function.js Normal file
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@ -0,0 +1,51 @@
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// nashorn supports passing script functions whenever
// a SAM (single abstract method) type object is expected
var System = Java.type("java.lang.System");
var Timer = Java.type("java.util.Timer");
var timer = new Timer();
// schedule method accepts java.util.TimerTask
// which is a single-abstract-method type. you
// can pass a script function and nashorn will
// wrap it as SAM implementor.
timer.schedule(function() {
print("Hello World!");
}, 1000);
// wait for timer thread to print by
// reading from stdin.
print("press any key to exit after message from timer...");
System.in.read();

59
nashorn/samples/shell.js
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -29,50 +29,53 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* This is a simple shell tool in JavaScript.
// Usage: jjs shell.js
/* This is a simple shell tool in JavaScript.
*
* Runs any operating system command using Java "exec". When "eval" command is
* used, evaluates argument(s) as JavaScript code.
*/
var imports = new JavaImporter(java.io, java.lang, java.util);
(function() {
// Java classes used
var Arrays = Java.type("java.util.Arrays");
var BufferedReader = Java.type("java.io.BufferedReader");
var InputStreamReader = Java.type("java.io.InputStreamReader");
var ProcessBuilder = Java.type("java.lang.ProcessBuilder");
var System = Java.type("java.lang.System");
function prompt() {
java.lang.System.out.print(">");
}
// print prompt
function prompt() {
System.out.print("> ");
}
with (imports) {
var reader = new BufferedReader(new InputStreamReader(System["in"]));
var line = null;
var reader = new BufferedReader(new InputStreamReader(System.in));
prompt();
while ((line = reader.readLine()) != null) {
if (line != "") {
var args = line.split(" ");
// read and evaluate each line from stdin
reader.lines().forEach(function(line) {
if (! line.isEmpty()) {
var args = line.split(' ');
try {
if (args[0] == "eval") {
var code = line.substring("eval".length);
// special 'eval' command to evaluate JS code
if (args[0] == 'eval') {
var code = line.substring('eval'.length);
var res = eval(code);
if (res != undefined) {
print(res);
}
} else {
var argList = new ArrayList();
for (i in args) { argList.add(args[i]); }
var procBuilder = new ProcessBuilder(argList);
procBuilder.redirectErrorStream();
var proc = procBuilder.start();
var out = new BufferedReader(new InputStreamReader(proc.getInputStream()));
var line = null;
while ((line = out.readLine()) != null) {
System.out.println(line);
}
proc.waitFor();
// build child process and start it!
new ProcessBuilder(Arrays.asList(args))
.inheritIO()
.start()
.waitFor();
}
} catch (e) {
// print exception, if any
print(e);
}
}
prompt();
}
}
})
})()

55
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@ -0,0 +1,55 @@
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// nashorn supports 'stack' property on ECMAScript
// error objects. This property's value is a string
// that shows script stack trace.
function g() {
throw new Error("wrong");
}
function f() {
g();
}
// Output looks something like:
//
// Error: wrong
// at g (stack.js:37)
// at f (stack.js:41)
// at <program> (stack.js:52)
try {
f();
} catch (e) {
print(e.stack);
}

1
nashorn/samples/test.js
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@ -30,4 +30,3 @@
*/
print("Hello World");

49
nashorn/samples/uniform_random.js Normal file
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@ -0,0 +1,49 @@
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// generate/print 100 uniformly distributed random values
// and print summary statistics on it
var DoubleStream = Java.type("java.util.stream.DoubleStream");
// pass script function when a lambda is required
// Math.random passed here for double generator lambda
// print passed to forEach method
DoubleStream
.generate(Math.random)
.limit(100)
.forEach(print);
print(DoubleStream
.generate(Math.random)
.limit(100)
.summaryStatistics());

39
nashorn/samples/uniq.js
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -29,27 +29,28 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Prints unique lines from a given file.
*/
// Usage: jjs uniq.js
// or: jjs uniq.js -- <file>
if (arguments.length != 1) {
print("Usage: jjs uniq.js -- <file>");
java.lang.System.exit(1);
}
// omit repeated lines and print unique lines
var imports = new JavaImporter(java.io);
var BufferedReader = Java.type("java.io.BufferedReader");
var FileReader = Java.type("java.io.FileReader");
var InputStreamReader = Java.type("java.io.InputStreamReader");
var System = Java.type("java.lang.System");
// use object as set - but insertion order preserved
var uniqueLines = {};
with (imports) {
var reader = new BufferedReader(new FileReader(arguments[0]));
while ((line = reader.readLine()) != null) {
// using a JS object as a map...
uniqueLines[line] = true;
}
}
var reader = arguments.length > 0 ?
new FileReader(arguments[0]) :
new InputStreamReader(System.in);
reader = new BufferedReader(reader);
// now print the collected lines
for (i in uniqueLines) {
print(i);
// add unique lines
reader.lines().forEach(function(line) {
uniqueLines[line] = true;
})
for (line in uniqueLines) {
print(line);
}

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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Usage: jjs uniqs.js -- <file>
// omit repeated lines and print unique lines
// But this version uses Stream API
if (arguments.length < 1) {
print("Usage: jjs uniqs.js -- <file>");
exit(1);
}
var Files = Java.type("java.nio.file.Files");
var FileSystems = Java.type("java.nio.file.FileSystems");
print('Unique lines:',
Files
.lines(FileSystems.default.getPath(arguments[0]))
.distinct()
.peek(print)
.count());

63
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#// usage: jjs -scripting weather.js
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Simple nashorn example showing back-quote exec process,
// JSON and Java8 streams
var Arrays = Java.type("java.util.Arrays");
// use curl to download JSON weather data from the net
// use backquote -scripting mode syntax to exec a process
`curl http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&amp;mode=json&amp;units=metric&amp;cnt=7`;
// parse JSON
var weather = JSON.parse($OUT);
// pull out humidity as array
var humidity = weather.list.map(function(curVal) {
return curVal.humidity;
})
// Stream API to print stat
print("Humidity");
print(Arrays["stream(int[])"](humidity).summaryStatistics());
// pull maximum day time temperature
var temp = weather.list.map(function(curVal) {
return curVal.temp.max;
});
// Stream API to print stat
print("Max Temperature");
print(Arrays["stream(double[])"](temp).summaryStatistics());