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