74 lines
2.7 KiB
Java
74 lines
2.7 KiB
Java
/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8025290
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* @summary javac implicit versus explicit lambda compilation error
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* @compile ExplicitVSImplicitLambdaTest.java
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*/
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import java.util.function.*;
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public class ExplicitVSImplicitLambdaTest {
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private void test()
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{
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/* in the explicit case "e" is inferred to String so we can use a String
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* only method.
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*/
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MyComparator.mycomparing1((String e) -> e.concat(""));
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MyComparator.mycomparing2((String e) -> e.concat(""));
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MyComparator.mycomparing3((String e) -> e.concat(""));
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MyComparator.mycomparing4((String e) -> e.concat(""));
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/* in the implicit case "e" is inferred to Object so toString() is OK.
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*/
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MyComparator.mycomparing1((e) -> e.toString());
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MyComparator.mycomparing2((e) -> e.toString());
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MyComparator.mycomparing3((e) -> e.toString());
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MyComparator.mycomparing4((e) -> e.toString());
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}
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}
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interface MyComparator<T> {
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public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing1(
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Function<? super T, ? extends U> keyExtractor) {
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return null;
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}
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public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing2(
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Function<? super T, ? super U> keyExtractor) {
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return null;
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}
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public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing3(
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Function<? extends T, ? extends U> keyExtractor) {
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return null;
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}
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public static <T, U extends Comparable<? super U>> MyComparator<T> mycomparing4(
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Function<? extends T, ? super U> keyExtractor) {
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return null;
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}
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}
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