aoqi@0: /*
aoqi@0:  * Copyright (c) 2012, 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:  *   This test is for lambda expressions
aoqi@0:  * @compile LambdaTest1.java
aoqi@0:  * @run main LambdaTest1
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.util.Collections;
aoqi@0: import java.util.List;
aoqi@0: import java.util.ArrayList;
aoqi@0: 
aoqi@0: public class LambdaTest1 {
aoqi@0:     public static void main(String[] args) {
aoqi@0: 
aoqi@0:         LambdaTest1 test = new LambdaTest1();
aoqi@0: 
aoqi@0:         test.method2((int n) -> { });
aoqi@0:         test.method2((int n) -> { });
aoqi@0:         test.method2((int n) -> { return; }); // ";" is mandatory here
aoqi@0:         test.method2((int n) -> { System.out.println(n); }); // ";" is optional here
aoqi@0:         test.method2(n -> { System.out.println(n); }); //warning, explict type required for n?
aoqi@0: 
aoqi@0:         test.method3(()-> { System.out.println("implementing VoidVoid.vvMethod()"); });
aoqi@0:         test.method3(() -> {});
aoqi@0: 
aoqi@0:         test.method4(()-> 42);
aoqi@0:         test.method4(()-> { return 42; });//";" is mandatory here
aoqi@0: 
aoqi@0:         test.method5((int n)-> n+1);
aoqi@0:         test.method5((int n) -> 42);
aoqi@0:         test.method5((int n) -> { return 42; });
aoqi@0:         test.method5(
aoqi@0:             (int n) -> { //"{" optional here
aoqi@0:                 if(n > 0)
aoqi@0:                     return n++;
aoqi@0:                 else
aoqi@0:                     return n--;
aoqi@0:             }
aoqi@0:         );
aoqi@0: 
aoqi@0:         Runnable r = ()-> { System.out.println("Runnable.run() method implemented"); };
aoqi@0:         r.run();
aoqi@0:         ((Runnable)()-> { System.out.println("Runnable.run() method implemented"); }).run();
aoqi@0:     }
aoqi@0: 
aoqi@0:     void method2(VoidInt a) {
aoqi@0:         System.out.println("method2()");
aoqi@0:         final int N = 1;
aoqi@0:         int n = 2; //effectively final variable
aoqi@0:         System.out.println("method2() \"this\":" + this);
aoqi@0:         ((Runnable)
aoqi@0:             ()->{
aoqi@0:                 System.out.println("inside lambda \"this\":" + this);
aoqi@0:                 System.out.println("inside lambda accessing final variable N:" + N);
aoqi@0:                 System.out.println("inside lambda accessing effectively final variable n:" + n);
aoqi@0:             }
aoqi@0:         ).run();
aoqi@0:         //n++; //compile error if n is modified
aoqi@0:         a.viMethod(2);
aoqi@0:     }
aoqi@0: 
aoqi@0:     void method3(VoidVoid a) {
aoqi@0:         System.out.println("method3()");
aoqi@0:         a.vvMethod();
aoqi@0:     }
aoqi@0: 
aoqi@0:     void method4(IntVoid a) {
aoqi@0:         System.out.println("method4()");
aoqi@0:         System.out.println(a.ivMethod());
aoqi@0:     }
aoqi@0: 
aoqi@0:     void method5(IntInt a) {
aoqi@0:         System.out.println("method5()");
aoqi@0:         System.out.println(a.iiMethod(5));
aoqi@0:     }
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: }