Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: test/tools/javac/lambda/funcInterfaces/LambdaTest1.java
test/tools/javac/lambda/funcInterfaces/LambdaTest1.java
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| 1 /* | |
| 2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 */ | |
| 23 | |
| 24 /** | |
| 25 * @test | |
| 26 * @bug 8003280 | |
| 27 * @summary Add lambda tests | |
| 28 * This test is for lambda expressions | |
| 29 * @compile LambdaTest1.java | |
| 30 * @run main LambdaTest1 | |
| 31 */ | |
| 32 | |
| 33 import java.util.Collections; | |
| 34 import java.util.List; | |
| 35 import java.util.ArrayList; | |
| 36 | |
| 37 public class LambdaTest1 { | |
| 38 public static void main(String[] args) { | |
| 39 | |
| 40 LambdaTest1 test = new LambdaTest1(); | |
| 41 | |
| 42 test.method2((int n) -> { }); | |
| 43 test.method2((int n) -> { }); | |
| 44 test.method2((int n) -> { return; }); // ";" is mandatory here | |
| 45 test.method2((int n) -> { System.out.println(n); }); // ";" is optional here | |
| 46 test.method2(n -> { System.out.println(n); }); //warning, explict type required for n? | |
| 47 | |
| 48 test.method3(()-> { System.out.println("implementing VoidVoid.vvMethod()"); }); | |
| 49 test.method3(() -> {}); | |
| 50 | |
| 51 test.method4(()-> 42); | |
| 52 test.method4(()-> { return 42; });//";" is mandatory here | |
| 53 | |
| 54 test.method5((int n)-> n+1); | |
| 55 test.method5((int n) -> 42); | |
| 56 test.method5((int n) -> { return 42; }); | |
| 57 test.method5( | |
| 58 (int n) -> { //"{" optional here | |
| 59 if(n > 0) | |
| 60 return n++; | |
| 61 else | |
| 62 return n--; | |
| 63 } | |
| 64 ); | |
| 65 | |
| 66 Runnable r = ()-> { System.out.println("Runnable.run() method implemented"); }; | |
| 67 r.run(); | |
| 68 ((Runnable)()-> { System.out.println("Runnable.run() method implemented"); }).run(); | |
| 69 } | |
| 70 | |
| 71 void method2(VoidInt a) { | |
| 72 System.out.println("method2()"); | |
| 73 final int N = 1; | |
| 74 int n = 2; //effectively final variable | |
| 75 System.out.println("method2() \"this\":" + this); | |
| 76 ((Runnable) | |
| 77 ()->{ | |
| 78 System.out.println("inside lambda \"this\":" + this); | |
| 79 System.out.println("inside lambda accessing final variable N:" + N); | |
| 80 System.out.println("inside lambda accessing effectively final variable n:" + n); | |
| 81 } | |
| 82 ).run(); | |
| 83 //n++; //compile error if n is modified | |
| 84 a.viMethod(2); | |
| 85 } | |
| 86 | |
| 87 void method3(VoidVoid a) { | |
| 88 System.out.println("method3()"); | |
| 89 a.vvMethod(); | |
| 90 } | |
| 91 | |
| 92 void method4(IntVoid a) { | |
| 93 System.out.println("method4()"); | |
| 94 System.out.println(a.ivMethod()); | |
| 95 } | |
| 96 | |
| 97 void method5(IntInt a) { | |
| 98 System.out.println("method5()"); | |
| 99 System.out.println(a.iiMethod(5)); | |
| 100 } | |
| 101 | |
| 102 | |
| 103 //SAM type interfaces | |
| 104 interface VoidInt { | |
| 105 void viMethod(int n); | |
| 106 } | |
| 107 | |
| 108 interface VoidVoid { | |
| 109 void vvMethod(); | |
| 110 } | |
| 111 | |
| 112 interface IntVoid { | |
| 113 int ivMethod(); | |
| 114 } | |
| 115 | |
| 116 interface IntInt { | |
| 117 int iiMethod(int n); | |
| 118 } | |
| 119 } |
