author | smarks |
Wed, 04 Dec 2013 18:02:33 +0000 | |
changeset 21976 | 92f0602be7c2 |
parent 18790 | d25399d849bc |
permissions | -rw-r--r-- |
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/* |
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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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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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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* This file is available under and governed by the GNU General Public |
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* License version 2 only, as published by the Free Software Foundation. |
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* However, the following notice accompanied the original version of this |
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* file: |
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* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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ef138d47df58
7034657: Update Creative Commons license URL in legal notices
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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package java.util.concurrent; |
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/** |
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* A task that returns a result and may throw an exception. |
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* Implementors define a single method with no arguments called |
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* {@code call}. |
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* |
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* <p>The {@code Callable} interface is similar to {@link |
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* java.lang.Runnable}, in that both are designed for classes whose |
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* instances are potentially executed by another thread. A |
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* {@code Runnable}, however, does not return a result and cannot |
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* throw a checked exception. |
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* |
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* <p>The {@link Executors} class contains utility methods to |
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* convert from other common forms to {@code Callable} classes. |
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* |
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* @see Executor |
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* @since 1.5 |
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* @author Doug Lea |
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* @param <V> the result type of method {@code call} |
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*/ |
21976
92f0602be7c2
8029141: Add @FunctionalInterface annotation to Callable interface
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@FunctionalInterface |
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public interface Callable<V> { |
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/** |
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* Computes a result, or throws an exception if unable to do so. |
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* |
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* @return computed result |
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* @throws Exception if unable to compute a result |
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*/ |
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V call() throws Exception; |
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} |