1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/lambda/IdentifierTest.java Wed Apr 27 01:34:52 2016 +0800
1.3 @@ -0,0 +1,182 @@
1.4 +/*
1.5 + * @test /nodynamiccopyright/
1.6 + * @bug 8007401 8007427
1.7 + * @author sogoel
1.8 + * @summary Test generation of warnings when '_' is used an identifier
1.9 + * @compile/fail/ref=IdentifierTest.out -Werror -XDrawDiagnostics IdentifierTest.java
1.10 + */
1.11 +
1.12 +import java.util.List;
1.13 +
1.14 +/*
1.15 + * This test checks for the generation of warnings when '_' is used as an
1.16 + * identifier in following cases:
1.17 + * package name, class name, class member names including constructor
1.18 + * cass members access using class object or this
1.19 + * loops: for, enhanced-for, while, do-while
1.20 + * arrays,
1.21 + * switch,
1.22 + * annotations, element=value pair
1.23 + * try-catch,
1.24 + * enum
1.25 + * break + identifier
1.26 + * continue + identifier
1.27 + * type-bounds
1.28 + * Above cases for identifier occurrences have been identified from JLS v3.
1.29 + *
1.30 + */
1.31 +
1.32 +// Test class
1.33 +public class IdentifierTest {
1.34 + class _UnderscorePrefix {}
1.35 + class Underscore_Infix {}
1.36 + class UnderscorePostfix_ {}
1.37 + class __ {}
1.38 +
1.39 + static final int _prefix = 10;
1.40 + List<String> postfix_;
1.41 +
1.42 + // Test: class with name as '_'
1.43 + class _ {
1.44 + String in_fix;
1.45 + //Test: Constructor, "_", local variable, value
1.46 + public _() {
1.47 + String _ = "_";
1.48 + in_fix = _;
1.49 + }
1.50 +
1.51 + public void testClassMembersAccess(String[] _args) {
1.52 + // Instance creation
1.53 + _ _ = new _();
1.54 + //Method invocation
1.55 + _.testTryCatch();
1.56 + //Field access
1.57 + _.in_fix = "__";
1.58 + }
1.59 +
1.60 + // Test: try-catch
1.61 + public void testTryCatch() {
1.62 + try {
1.63 + int _ = 30/0;
1.64 + } catch (ArithmeticException _) {
1.65 + System.out.println("Got Arithmentic exception " + _);
1.66 + }
1.67 + }
1.68 + }
1.69 +
1.70 + // Test: class member access using class object '_', use of this.
1.71 + class TestMisc {
1.72 + int _;
1.73 + void _ () {
1.74 + this._ = 5;
1.75 + }
1.76 +
1.77 + public void testClassMemberAccess(String[] args) {
1.78 + // Instance creation
1.79 + TestMisc _ = new TestMisc();
1.80 + //Field access
1.81 + _._ = 10;
1.82 + //Method access
1.83 + _._();
1.84 + }
1.85 + }
1.86 +
1.87 + //Test: Type Bounds
1.88 + class TestTypeBounds {
1.89 + //Type bounds
1.90 + <_ extends Object> void test(_ t) {}
1.91 + }
1.92 +
1.93 + // Test: enum and switch case
1.94 + static class TestEnum {
1.95 + // Enum
1.96 + enum _ {
1.97 + _MONDAY, _TUESDAY, _WEDNESDAY, _THURSDAY, _FRIDAY,
1.98 + _SATURDAY, _SUNDAY;
1.99 + }
1.100 +
1.101 + void foo() {
1.102 + // switch-case
1.103 + for(_ _day : _.values()) {
1.104 + switch(_day) {
1.105 + case _SATURDAY:
1.106 + case _SUNDAY:
1.107 + System.out.println("Weekend is here!");
1.108 + break;
1.109 + default:
1.110 + System.out.println("Weekday is here!");
1.111 + break;
1.112 + }
1.113 + }
1.114 + }
1.115 + }
1.116 +
1.117 + // Test: Annotation
1.118 + static class TestAnno {
1.119 + // Annotation with name as _
1.120 + @interface _ {
1.121 + String _name();
1.122 + int _id();
1.123 + }
1.124 + // Element-Value pair
1.125 + @_(_name ="m",_id=1)
1.126 + public void m(int arg) {}
1.127 +
1.128 + //Annotation with _ as one of the elements
1.129 + @interface MyAnno {
1.130 + int _();
1.131 + }
1.132 + // Element Value pair
1.133 + @MyAnno(_='1')
1.134 + public void m2() {}
1.135 + }
1.136 +
1.137 + // Test: for loop, while loop, do-while loop, increment/decrement op, condition, print
1.138 + public void testLoop() {
1.139 + // for loop
1.140 + for(int _ = 0; _ < 5; ++_) {
1.141 + System.out.println("_=" + _ + " ");
1.142 + }
1.143 +
1.144 + // while loop
1.145 + int _ = 0;
1.146 + while(_ <= 5) {
1.147 + _++;
1.148 + }
1.149 +
1.150 + //do-while loop
1.151 + do {
1.152 + --_;
1.153 + } while(_ > 0);
1.154 + }
1.155 +
1.156 + // Test: Array and enhanced for loop
1.157 + public void testArraysEnhancedForLoop() {
1.158 + // Arrays
1.159 + String _[] = {"A","B","C","D"};
1.160 +
1.161 + for(String _s : _ ) {
1.162 + System.out.println("_s="+_s);
1.163 + }
1.164 + }
1.165 +
1.166 + // Test: Labels in break, continue
1.167 + public void testLabels() {
1.168 + // break/continue with labels
1.169 + int j = 0;
1.170 + _:
1.171 + for (int i = 0; i <= 5; i++) {
1.172 + while( j > 4 ) {
1.173 + j++;
1.174 + continue _;
1.175 + }
1.176 + break _;
1.177 + }
1.178 + }
1.179 +}
1.180 +
1.181 +//interface
1.182 +interface _ {
1.183 + void mI();
1.184 +}
1.185 +
