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