jdk8-mips64-public/langtools: test/tools/javac/lambda/lambdaExpression/LambdaTest1.java@acd64168cf8b (annotated)

test/tools/javac/lambda/lambdaExpression/LambdaTest1.java@acd64168cf8b (annotated)

test/tools/javac/lambda/lambdaExpression/LambdaTest1.java

Tue, 22 Apr 2014 17:55:22 +0100

author: vromero
date: Tue, 22 Apr 2014 17:55:22 +0100
changeset 2370: acd64168cf8b
parent 1415: 01c9d4161882
child 2525: 2eb010b6cb22
permissions: -rw-r--r--

8029718: Should always use lambda body structure to disambiguate overload resolution
Reviewed-by: dlsmith, jjg, jlahoda

 /*
  * Copyright (c) 2011, 2014, 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 existing SAM interfaces like Runnable and Comparator<T>
  * @compile LambdaTest1.java
  * @run main LambdaTest1
  */
 import java.util.Collections;
 import java.util.List;
 import java.util.ArrayList;
 public class LambdaTest1 {
     private static String assertionStr = "";
     private static void assertTrue(boolean b) {
         if(!b)
             throw new AssertionError();
     }
     private static void test1(Runnable r) {
         r.run();
     }
     void test2(Object o) {
         if(o instanceof Runnable)
             ((Runnable)o).run();
     }
     Runnable test3() {
         return ()-> { assertionStr += "Runnable6"; };
     }
     public static void main(String[] args) {
         //lambda expressions for SAM interface Runnable:
         //assign:
         Runnable r = ()-> { assertionStr += "Runnable1 "; };
         r.run();
         //cast:
         ((Runnable)()-> { assertionStr += "Runnable2 "; }).run();
         Object o = (Runnable)()-> {};
         o = (Runnable)()-> {
                 switch (assertionStr) {
                     case "Runnable1 Runnable2 ":
                         assertionStr += "Runnable3 ";
                         break;
                     default:
                         throw new AssertionError();
                 }
                 return;
             };
         //method parameter:
         test1(()-> { assertionStr += "Runnable4 "; return; });
         LambdaTest1 test = new LambdaTest1();
         test.test2((Runnable)()-> { assertionStr += "Runnable5 "; });
         //return type:
         r = test.test3();
         r.run();
         assertTrue(assertionStr.equals("Runnable1 Runnable2 Runnable4 Runnable5 Runnable6"));
         //lambda expressions for SAM interface Comparator<T>:
         List<Integer> list = new ArrayList<Integer>();
         list.add(4);
         list.add(10);
         list.add(-5);
         list.add(100);
         list.add(9);
         Collections.sort(list, (Integer i1, Integer i2)-> i2 - i1);
         String result = "";
         for(int i : list)
             result += i + " ";
         assertTrue(result.equals("100 10 9 4 -5 "));
         Collections.sort(list,
             (i1, i2) -> {
                 String s1 = i1.toString();
                 String s2 = i2.toString();
                 return s1.length() - s2.length();
              });
         result = "";
         for(int i : list)
             result += i + " ";
         assertTrue(result.equals("9 4 10 -5 100 "));
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/lambda/lambdaExpression/LambdaTest1.java@acd64168cf8b (annotated)

test/tools/javac/lambda/lambdaExpression/LambdaTest1.java