Wed, 24 Sep 2014 11:38:26 -0700
Added tag jdk8u40-b07 for changeset 2fa3858a281f
1 /*
2 * Copyright (c) 2013, 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 */
24 /*
25 * @test
26 * @bug 8025290
27 * @summary javac implicit versus explicit lambda compilation error
28 * @compile ExplicitVSImplicitLambdaTest.java
29 */
31 import java.util.function.*;
33 public class ExplicitVSImplicitLambdaTest {
34 private void test()
35 {
36 /* in the explicit case "e" is inferred to String so we can use a String
37 * only method.
38 */
39 MyComparator.mycomparing1((String e) -> e.concat(""));
40 MyComparator.mycomparing2((String e) -> e.concat(""));
41 MyComparator.mycomparing3((String e) -> e.concat(""));
42 MyComparator.mycomparing4((String e) -> e.concat(""));
44 /* in the implicit case "e" is inferred to Object so toString() is OK.
45 */
46 MyComparator.mycomparing1((e) -> e.toString());
47 MyComparator.mycomparing2((e) -> e.toString());
48 MyComparator.mycomparing3((e) -> e.toString());
49 MyComparator.mycomparing4((e) -> e.toString());
50 }
51 }
53 interface MyComparator<T> {
54 public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing1(
55 Function<? super T, ? extends U> keyExtractor) {
56 return null;
57 }
59 public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing2(
60 Function<? super T, ? super U> keyExtractor) {
61 return null;
62 }
64 public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing3(
65 Function<? extends T, ? extends U> keyExtractor) {
66 return null;
67 }
69 public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing4(
70 Function<? extends T, ? super U> keyExtractor) {
71 return null;
72 }
73 }