184 lines
4.3 KiB
Java
184 lines
4.3 KiB
Java
/*
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* @test /nodynamiccopyright/
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* @bug 8007401 8007427 8061549
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* @author sogoel
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* @summary Test generation of warnings when '_' is used an identifier
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* @compile/fail/ref=IdentifierTest8.out --release 8 -Werror -XDrawDiagnostics -Xlint:-options IdentifierTest.java
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* @compile/fail/ref=IdentifierTest9.out -XDrawDiagnostics IdentifierTest.java
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*/
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import java.util.List;
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/*
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* This test checks for the generation of warnings when '_' is used as an
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* identifier in following cases:
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* package name, class name, class member names including constructor
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* cass members access using class object or this
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* loops: for, enhanced-for, while, do-while
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* arrays,
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* switch,
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* annotations, element=value pair
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* try-catch,
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* enum
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* break + identifier
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* continue + identifier
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* type-bounds
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* Above cases for identifier occurrences have been identified from JLS v3.
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*
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*/
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// Test class
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public class IdentifierTest {
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class _UnderscorePrefix {}
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class Underscore_Infix {}
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class UnderscorePostfix_ {}
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class __ {}
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static final int _prefix = 10;
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List<String> postfix_;
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// Test: class with name as '_'
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class _ {
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String in_fix;
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//Test: Constructor, "_", local variable, value
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public _() {
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String _ = "_";
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in_fix = _;
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}
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public void testClassMembersAccess(String[] _args) {
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// Instance creation
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_ _ = new _();
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//Method invocation
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_.testTryCatch();
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//Field access
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_.in_fix = "__";
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}
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// Test: try-catch
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public void testTryCatch() {
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try {
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int _ = 30/0;
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} catch (ArithmeticException _) {
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System.out.println("Got Arithmentic exception " + _);
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}
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}
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}
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// Test: class member access using class object '_', use of this.
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class TestMisc {
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int _;
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void _ () {
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this._ = 5;
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}
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public void testClassMemberAccess(String[] args) {
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// Instance creation
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TestMisc _ = new TestMisc();
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//Field access
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_._ = 10;
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//Method access
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_._();
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}
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}
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//Test: Type Bounds
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class TestTypeBounds {
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//Type bounds
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<_ extends Object> void test(_ t) {}
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}
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// Test: enum and switch case
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static class TestEnum {
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// Enum
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enum _ {
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_MONDAY, _TUESDAY, _WEDNESDAY, _THURSDAY, _FRIDAY,
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_SATURDAY, _SUNDAY;
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}
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void foo() {
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// switch-case
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for(_ _day : _.values()) {
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switch(_day) {
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case _SATURDAY:
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case _SUNDAY:
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System.out.println("Weekend is here!");
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break;
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default:
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System.out.println("Weekday is here!");
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break;
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}
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}
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}
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}
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// Test: Annotation
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static class TestAnno {
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// Annotation with name as _
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@interface _ {
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String _name();
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int _id();
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}
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// Element-Value pair
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@_(_name ="m",_id=1)
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public void m(int arg) {}
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//Annotation with _ as one of the elements
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@interface MyAnno {
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int _();
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}
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// Element Value pair
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@MyAnno(_='1')
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public void m2() {}
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}
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// Test: for loop, while loop, do-while loop, increment/decrement op, condition, print
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public void testLoop() {
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// for loop
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for(int _ = 0; _ < 5; ++_) {
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System.out.println("_=" + _ + " ");
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}
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// while loop
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int _ = 0;
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while(_ <= 5) {
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_++;
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}
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//do-while loop
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do {
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--_;
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} while(_ > 0);
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}
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// Test: Array and enhanced for loop
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public void testArraysEnhancedForLoop() {
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// Arrays
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String _[] = {"A","B","C","D"};
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for(String _s : _ ) {
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System.out.println("_s="+_s);
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}
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}
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// Test: Labels in break, continue
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public void testLabels() {
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// break/continue with labels
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int j = 0;
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_:
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for (int i = 0; i <= 5; i++) {
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while( j > 4 ) {
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j++;
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continue _;
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}
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break _;
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}
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}
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}
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//interface
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interface _ {
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void mI();
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}
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