Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: test/tools/javac/lambda/LambdaCapture02.java
test/tools/javac/lambda/LambdaCapture02.java
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| 1 /* | |
| 2 * Copyright (c) 2011, 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 * basic test for capture of non-mutable locals | |
| 29 * @author Brian Goetz | |
| 30 * @author Maurizio Cimadamore | |
| 31 * @run main LambdaCapture02 | |
| 32 */ | |
| 33 | |
| 34 public class LambdaCapture02 { | |
| 35 | |
| 36 static int assertionCount = 0; | |
| 37 | |
| 38 static void assertTrue(boolean cond) { | |
| 39 assertionCount++; | |
| 40 if (!cond) | |
| 41 throw new AssertionError(); | |
| 42 } | |
| 43 | |
| 44 interface Tester { | |
| 45 void test(); | |
| 46 } | |
| 47 | |
| 48 interface TU<T, U> { | |
| 49 public T foo(U u); | |
| 50 } | |
| 51 | |
| 52 public static <T, U> T exec(TU<T, U> lambda, U x) { | |
| 53 return lambda.foo(x); | |
| 54 } | |
| 55 | |
| 56 public Integer n = 5; | |
| 57 | |
| 58 //Simple local capture | |
| 59 void test1() { | |
| 60 final Integer N = 1; | |
| 61 int res = LambdaCapture02.<Integer,Integer>exec((Integer x) -> x + N, 3); | |
| 62 assertTrue(4 == res); | |
| 63 } | |
| 64 | |
| 65 //Local capture with multiple scopes (anon class) | |
| 66 void test2() { | |
| 67 final Integer N = 1; | |
| 68 new Tester() { | |
| 69 public void test() { | |
| 70 final Integer M = 2; | |
| 71 int res = LambdaCapture02.<Integer,Integer>exec((Integer x) -> x + N + M, 3); | |
| 72 assertTrue(6 == res); | |
| 73 } | |
| 74 }.test(); | |
| 75 } | |
| 76 | |
| 77 //Local capture with multiple scopes (local class) | |
| 78 void test3() { | |
| 79 final Integer N = 1; | |
| 80 class MyTester implements Tester { | |
| 81 public void test() { | |
| 82 final Integer M = 2; | |
| 83 int res = LambdaCapture02.<Integer,Integer>exec((Integer x) -> x + N + M, 3); | |
| 84 assertTrue(6 == res); | |
| 85 } | |
| 86 } | |
| 87 new MyTester().test(); | |
| 88 } | |
| 89 | |
| 90 //access to field from enclosing scope | |
| 91 void test4() { | |
| 92 final Integer N = 4; | |
| 93 int res1 = LambdaCapture02.<Integer,Integer>exec((Integer x) -> x + n + N, 3); | |
| 94 assertTrue(12 == res1); | |
| 95 int res2 = LambdaCapture02.<Integer,Integer>exec((Integer x) -> x + LambdaCapture02.this.n + N, 3); | |
| 96 assertTrue(12 == res2); | |
| 97 } | |
| 98 | |
| 99 public static void main(String[] args) { | |
| 100 LambdaCapture02 t = new LambdaCapture02(); | |
| 101 t.test1(); | |
| 102 t.test2(); | |
| 103 t.test3(); | |
| 104 t.test4(); | |
| 105 assertTrue(assertionCount == 5); | |
| 106 } | |
| 107 } |
