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