mcimadamore@1415: /*
mcimadamore@1415:  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
mcimadamore@1415:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
mcimadamore@1415:  *
mcimadamore@1415:  * This code is free software; you can redistribute it and/or modify it
mcimadamore@1415:  * under the terms of the GNU General Public License version 2 only, as
mcimadamore@1415:  * published by the Free Software Foundation.
mcimadamore@1415:  *
mcimadamore@1415:  * This code is distributed in the hope that it will be useful, but WITHOUT
mcimadamore@1415:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
mcimadamore@1415:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
mcimadamore@1415:  * version 2 for more details (a copy is included in the LICENSE file that
mcimadamore@1415:  * accompanied this code).
mcimadamore@1415:  *
mcimadamore@1415:  * You should have received a copy of the GNU General Public License version
mcimadamore@1415:  * 2 along with this work; if not, write to the Free Software Foundation,
mcimadamore@1415:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
mcimadamore@1415:  *
mcimadamore@1415:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
mcimadamore@1415:  * or visit www.oracle.com if you need additional information or have any
mcimadamore@1415:  * questions.
mcimadamore@1415:  */
mcimadamore@1415: 
mcimadamore@1415: /**
mcimadamore@1415:  * @test
mcimadamore@1415:  * @bug 8003280
mcimadamore@1415:  * @summary Add lambda tests
mcimadamore@1415:  *   Test lambda expressions for existing SAM interfaces like Runnable and Comparator<T>
mcimadamore@1415:  * @compile LambdaTest1.java
mcimadamore@1415:  * @run main LambdaTest1
mcimadamore@1415:  */
mcimadamore@1415: 
mcimadamore@1415: import java.util.Collections;
mcimadamore@1415: import java.util.List;
mcimadamore@1415: import java.util.ArrayList;
mcimadamore@1415: import java.util.Date;
mcimadamore@1415: 
mcimadamore@1415: public class LambdaTest1 {
mcimadamore@1415: 
mcimadamore@1415:     private static String assertionStr = "";
mcimadamore@1415: 
mcimadamore@1415:     private static void assertTrue(boolean b) {
mcimadamore@1415:         if(!b)
mcimadamore@1415:             throw new AssertionError();
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     private static void test1(Runnable r) {
mcimadamore@1415:         r.run();
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     void test2(Object o) {
mcimadamore@1415:         if(o instanceof Runnable)
mcimadamore@1415:             ((Runnable)o).run();
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     Runnable test3() {
mcimadamore@1415:         return ()-> { assertionStr += "Runnable6"; };
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     public static void main(String[] args) {
mcimadamore@1415: 
mcimadamore@1415:         //lambda expressions for SAM interface Runnable:
mcimadamore@1415:         //assign:
mcimadamore@1415:         Runnable r = ()-> { assertionStr += "Runnable1 "; };
mcimadamore@1415:         r.run();
mcimadamore@1415: 
mcimadamore@1415:         //cast:
mcimadamore@1415:         ((Runnable)()-> { assertionStr += "Runnable2 "; }).run();
mcimadamore@1415: 
mcimadamore@1415:         Object o = (Runnable)()-> {};
mcimadamore@1415: 
mcimadamore@1415:         o = (Runnable)()-> {
mcimadamore@1415:                 switch (assertionStr) {
mcimadamore@1415:                     case "Runnable1 Runnable2 ":
mcimadamore@1415:                         assertionStr += "Runnable3 ";
mcimadamore@1415:                         break;
mcimadamore@1415:                     default:
mcimadamore@1415:                         throw new AssertionError();
mcimadamore@1415:                 }
mcimadamore@1415:                 return;
mcimadamore@1415:             };
mcimadamore@1415: 
mcimadamore@1415:         //method parameter:
mcimadamore@1415:         test1(()-> { assertionStr += "Runnable4 "; return; });
mcimadamore@1415: 
mcimadamore@1415:         LambdaTest1 test = new LambdaTest1();
mcimadamore@1415:         test.test2((Runnable)()-> { assertionStr += "Runnable5 "; });
mcimadamore@1415: 
mcimadamore@1415:         //return type:
mcimadamore@1415:         r = test.test3();
mcimadamore@1415:         r.run();
mcimadamore@1415: 
mcimadamore@1415:         assertTrue(assertionStr.equals("Runnable1 Runnable2 Runnable4 Runnable5 Runnable6"));
mcimadamore@1415: 
mcimadamore@1415:         //lambda expressions for SAM interface Comparator<T>:
mcimadamore@1415:         List<Integer> list = new ArrayList<Integer>();
mcimadamore@1415:         list.add(4);
mcimadamore@1415:         list.add(10);
mcimadamore@1415:         list.add(-5);
mcimadamore@1415:         list.add(100);
mcimadamore@1415:         list.add(9);
mcimadamore@1415:         Collections.sort(list, (Integer i1, Integer i2)-> i2 - i1);
mcimadamore@1415:         String result = "";
mcimadamore@1415:         for(int i : list)
mcimadamore@1415:             result += i + " ";
mcimadamore@1415:         assertTrue(result.equals("100 10 9 4 -5 "));
mcimadamore@1415: 
mcimadamore@1415:         Collections.sort(list,
mcimadamore@1415:             (i1, i2) -> {
mcimadamore@1415:                 String s1 = i1.toString();
mcimadamore@1415:                 String s2 = i2.toString();
mcimadamore@1415:                 return s1.length() - s2.length();
mcimadamore@1415:              });
mcimadamore@1415:         result = "";
mcimadamore@1415:         for(int i : list)
mcimadamore@1415:             result += i + " ";
mcimadamore@1415:         assertTrue(result.equals("9 4 10 -5 100 "));
mcimadamore@1415:     }
mcimadamore@1415: }