Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: test/tools/javac/lambda/TargetType03.java
test/tools/javac/lambda/TargetType03.java
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| 1 /* | |
| 2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 */ | |
| 23 | |
| 24 /* | |
| 25 * @test | |
| 26 * @bug 8003280 | |
| 27 * @summary Add lambda tests | |
| 28 * check overload resolution and target type inference w.r.t. generic methods | |
| 29 * @author Maurizio Cimadamore | |
| 30 * @run main TargetType03 | |
| 31 */ | |
| 32 import java.util.*; | |
| 33 | |
| 34 public class TargetType03 { | |
| 35 | |
| 36 interface Mapper<X,Y> { | |
| 37 Y myMap(X a); | |
| 38 } | |
| 39 | |
| 40 static class MapperList<A> extends ArrayList<A> { | |
| 41 public <B> List<B> myMap(Mapper<A, B> mapper) { | |
| 42 ArrayList<B> mappedList = new ArrayList<>(); | |
| 43 for (A elem : this) { | |
| 44 mappedList.add(mapper.myMap(elem)); | |
| 45 } | |
| 46 return mappedList; | |
| 47 }; | |
| 48 } | |
| 49 | |
| 50 public static void main(String[] args) { | |
| 51 MapperList<Integer> numbers = new MapperList<>(); | |
| 52 numbers.add(1); | |
| 53 numbers.add(2); | |
| 54 numbers.add(3); | |
| 55 numbers.add(4); | |
| 56 numbers.add(5); | |
| 57 List<Integer> sqNumbers = numbers.myMap(a -> a * a); | |
| 58 //check invariants | |
| 59 if (numbers.size() != sqNumbers.size()) { | |
| 60 throw new AssertionError(); | |
| 61 } | |
| 62 for (int i = 0; i < numbers.size() ; i ++) { | |
| 63 if (sqNumbers.get(i) != Math.pow(numbers.get(i), 2)) { | |
| 64 throw new AssertionError(); | |
| 65 } | |
| 66 } | |
| 67 } | |
| 68 } |
