| /* |
| * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 8003280 |
| * @summary Add lambda tests |
| * Test lambda expressions for different method signatures (parameter and return type) |
| * @compile LambdaTest2.java |
| * @run main LambdaTest2 |
| */ |
| |
| public class LambdaTest2 { |
| |
| private static int count = 0; |
| |
| private static void assertTrue(boolean b) { |
| if(!b) |
| throw new AssertionError(); |
| } |
| |
| public static void main(String[] args) { |
| LambdaTest2 test = new LambdaTest2(); |
| |
| test.method2((int n) -> { ; }); |
| test.method2(n -> { }); // "int" is optional here |
| test.method2((int n) -> { }); // ";" is optional here |
| test.method2((int n) -> { return; }); // ";" is mandatory here |
| test.method2((int n) -> { count += n; }); |
| assertTrue(count == 10); |
| |
| VoidInt vi = (int i) -> { |
| switch (i) { |
| case 0: |
| System.out.println("normal"); |
| break; |
| default: |
| System.out.println("invalid"); |
| } |
| }; |
| |
| test.method3(()-> { count++; }); |
| test.method3(() -> {}); |
| assertTrue(count == 11); |
| |
| VoidVoid vv = ()-> { while(true) |
| if(false) |
| break; |
| else |
| continue; |
| }; |
| |
| IntVoid iv1 = () -> 42; |
| IntVoid iv2 = () -> { return 43; };//";" is mandatory here |
| assertTrue(iv1.ivMethod() == 42); |
| assertTrue(iv2.ivMethod() == 43); |
| |
| IntInt ii1 = (int n) -> n+1; |
| IntInt ii2 = n -> 42; |
| IntInt ii3 = n -> { return 43; }; |
| IntInt ii4 = |
| (int n) -> { |
| if(n > 0) |
| return n+1; |
| else |
| return n-1; |
| }; |
| assertTrue(ii1.iiMethod(1) == 2); |
| assertTrue(ii2.iiMethod(1) == 42); |
| assertTrue(ii3.iiMethod(1) == 43); |
| assertTrue(ii4.iiMethod(-1) == -2); |
| } |
| |
| void method2(VoidInt a) { |
| a.viMethod(10); |
| } |
| |
| void method3(VoidVoid a) { |
| a.vvMethod(); |
| } |
| |
| //SAM type interfaces |
| interface VoidInt { |
| void viMethod(int n); |
| } |
| |
| interface VoidVoid { |
| void vvMethod(); |
| } |
| |
| interface IntVoid { |
| int ivMethod(); |
| } |
| |
| interface IntInt { |
| int iiMethod(int n); |
| } |
| } |