| /* |
| * Copyright (c) 2013, 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 8025290 |
| * @summary javac implicit versus explicit lambda compilation error |
| * @compile ExplicitVSImplicitLambdaTest.java |
| */ |
| |
| import java.util.function.*; |
| |
| public class ExplicitVSImplicitLambdaTest { |
| private void test() |
| { |
| /* in the explicit case "e" is inferred to String so we can use a String |
| * only method. |
| */ |
| MyComparator.mycomparing1((String e) -> e.concat("")); |
| MyComparator.mycomparing2((String e) -> e.concat("")); |
| MyComparator.mycomparing3((String e) -> e.concat("")); |
| MyComparator.mycomparing4((String e) -> e.concat("")); |
| |
| /* in the implicit case "e" is inferred to Object so toString() is OK. |
| */ |
| MyComparator.mycomparing1((e) -> e.toString()); |
| MyComparator.mycomparing2((e) -> e.toString()); |
| MyComparator.mycomparing3((e) -> e.toString()); |
| MyComparator.mycomparing4((e) -> e.toString()); |
| } |
| } |
| |
| interface MyComparator<T> { |
| public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing1( |
| Function<? super T, ? extends U> keyExtractor) { |
| return null; |
| } |
| |
| public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing2( |
| Function<? super T, ? super U> keyExtractor) { |
| return null; |
| } |
| |
| public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing3( |
| Function<? extends T, ? extends U> keyExtractor) { |
| return null; |
| } |
| |
| public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing4( |
| Function<? extends T, ? super U> keyExtractor) { |
| return null; |
| } |
| } |