Mercurial > jdk8-mips64-public > langtools / annotate
test/tools/javac/lambda/funcInterfaces/LambdaTest1.java@349160289ba2 (annotated)
test/tools/javac/lambda/funcInterfaces/LambdaTest1.java
Thu, 06 Jun 2013 15:33:40 +0100
- author
- mcimadamore
- date
- Thu, 06 Jun 2013 15:33:40 +0100
- changeset 1811
- 349160289ba2
- parent 0
- 959103a6100f
- permissions
- -rw-r--r--
8008627: Compiler mishandles three-way return-type-substitutability
Summary: Compiler should not enforce an order in how ambiguous methods should be resolved
Reviewed-by: jjg, vromero
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | */ |
| aoqi@0 | 23 | |
| aoqi@0 | 24 | /** |
| aoqi@0 | 25 | * @test |
| aoqi@0 | 26 | * @bug 8003280 |
| aoqi@0 | 27 | * @summary Add lambda tests |
| aoqi@0 | 28 | * This test is for lambda expressions |
| aoqi@0 | 29 | * @compile LambdaTest1.java |
| aoqi@0 | 30 | * @run main LambdaTest1 |
| aoqi@0 | 31 | */ |
| aoqi@0 | 32 | |
| aoqi@0 | 33 | import java.util.Collections; |
| aoqi@0 | 34 | import java.util.List; |
| aoqi@0 | 35 | import java.util.ArrayList; |
| aoqi@0 | 36 | |
| aoqi@0 | 37 | public class LambdaTest1 { |
| aoqi@0 | 38 | public static void main(String[] args) { |
| aoqi@0 | 39 | |
| aoqi@0 | 40 | LambdaTest1 test = new LambdaTest1(); |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | test.method2((int n) -> { }); |
| aoqi@0 | 43 | test.method2((int n) -> { }); |
| aoqi@0 | 44 | test.method2((int n) -> { return; }); // ";" is mandatory here |
| aoqi@0 | 45 | test.method2((int n) -> { System.out.println(n); }); // ";" is optional here |
| aoqi@0 | 46 | test.method2(n -> { System.out.println(n); }); //warning, explict type required for n? |
| aoqi@0 | 47 | |
| aoqi@0 | 48 | test.method3(()-> { System.out.println("implementing VoidVoid.vvMethod()"); }); |
| aoqi@0 | 49 | test.method3(() -> {}); |
| aoqi@0 | 50 | |
| aoqi@0 | 51 | test.method4(()-> 42); |
| aoqi@0 | 52 | test.method4(()-> { return 42; });//";" is mandatory here |
| aoqi@0 | 53 | |
| aoqi@0 | 54 | test.method5((int n)-> n+1); |
| aoqi@0 | 55 | test.method5((int n) -> 42); |
| aoqi@0 | 56 | test.method5((int n) -> { return 42; }); |
| aoqi@0 | 57 | test.method5( |
| aoqi@0 | 58 | (int n) -> { //"{" optional here |
| aoqi@0 | 59 | if(n > 0) |
| aoqi@0 | 60 | return n++; |
| aoqi@0 | 61 | else |
| aoqi@0 | 62 | return n--; |
| aoqi@0 | 63 | } |
| aoqi@0 | 64 | ); |
| aoqi@0 | 65 | |
| aoqi@0 | 66 | Runnable r = ()-> { System.out.println("Runnable.run() method implemented"); }; |
| aoqi@0 | 67 | r.run(); |
| aoqi@0 | 68 | ((Runnable)()-> { System.out.println("Runnable.run() method implemented"); }).run(); |
| aoqi@0 | 69 | } |
| aoqi@0 | 70 | |
| aoqi@0 | 71 | void method2(VoidInt a) { |
| aoqi@0 | 72 | System.out.println("method2()"); |
| aoqi@0 | 73 | final int N = 1; |
| aoqi@0 | 74 | int n = 2; //effectively final variable |
| aoqi@0 | 75 | System.out.println("method2() \"this\":" + this); |
| aoqi@0 | 76 | ((Runnable) |
| aoqi@0 | 77 | ()->{ |
| aoqi@0 | 78 | System.out.println("inside lambda \"this\":" + this); |
| aoqi@0 | 79 | System.out.println("inside lambda accessing final variable N:" + N); |
| aoqi@0 | 80 | System.out.println("inside lambda accessing effectively final variable n:" + n); |
| aoqi@0 | 81 | } |
| aoqi@0 | 82 | ).run(); |
| aoqi@0 | 83 | //n++; //compile error if n is modified |
| aoqi@0 | 84 | a.viMethod(2); |
| aoqi@0 | 85 | } |
| aoqi@0 | 86 | |
| aoqi@0 | 87 | void method3(VoidVoid a) { |
| aoqi@0 | 88 | System.out.println("method3()"); |
| aoqi@0 | 89 | a.vvMethod(); |
| aoqi@0 | 90 | } |
| aoqi@0 | 91 | |
| aoqi@0 | 92 | void method4(IntVoid a) { |
| aoqi@0 | 93 | System.out.println("method4()"); |
| aoqi@0 | 94 | System.out.println(a.ivMethod()); |
| aoqi@0 | 95 | } |
| aoqi@0 | 96 | |
| aoqi@0 | 97 | void method5(IntInt a) { |
| aoqi@0 | 98 | System.out.println("method5()"); |
| aoqi@0 | 99 | System.out.println(a.iiMethod(5)); |
| aoqi@0 | 100 | } |
| aoqi@0 | 101 | |
| aoqi@0 | 102 | |
| aoqi@0 | 103 | //SAM type interfaces |
| aoqi@0 | 104 | interface VoidInt { |
| aoqi@0 | 105 | void viMethod(int n); |
| aoqi@0 | 106 | } |
| aoqi@0 | 107 | |
| aoqi@0 | 108 | interface VoidVoid { |
| aoqi@0 | 109 | void vvMethod(); |
| aoqi@0 | 110 | } |
| aoqi@0 | 111 | |
| aoqi@0 | 112 | interface IntVoid { |
| aoqi@0 | 113 | int ivMethod(); |
| aoqi@0 | 114 | } |
| aoqi@0 | 115 | |
| aoqi@0 | 116 | interface IntInt { |
| aoqi@0 | 117 | int iiMethod(int n); |
| aoqi@0 | 118 | } |
| aoqi@0 | 119 | } |
