1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/emul/compact/src/main/java/java/util/concurrent/Callable.java Mon Feb 25 19:00:08 2013 +0100
1.3 @@ -0,0 +1,65 @@
1.4 +/*
1.5 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.6 + *
1.7 + * This code is free software; you can redistribute it and/or modify it
1.8 + * under the terms of the GNU General Public License version 2 only, as
1.9 + * published by the Free Software Foundation. Oracle designates this
1.10 + * particular file as subject to the "Classpath" exception as provided
1.11 + * by Oracle in the LICENSE file that accompanied this code.
1.12 + *
1.13 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.14 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.15 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.16 + * version 2 for more details (a copy is included in the LICENSE file that
1.17 + * accompanied this code).
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License version
1.20 + * 2 along with this work; if not, write to the Free Software Foundation,
1.21 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.22 + *
1.23 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.24 + * or visit www.oracle.com if you need additional information or have any
1.25 + * questions.
1.26 + */
1.27 +
1.28 +/*
1.29 + * This file is available under and governed by the GNU General Public
1.30 + * License version 2 only, as published by the Free Software Foundation.
1.31 + * However, the following notice accompanied the original version of this
1.32 + * file:
1.33 + *
1.34 + * Written by Doug Lea with assistance from members of JCP JSR-166
1.35 + * Expert Group and released to the public domain, as explained at
1.36 + * http://creativecommons.org/publicdomain/zero/1.0/
1.37 + */
1.38 +
1.39 +package java.util.concurrent;
1.40 +
1.41 +/**
1.42 + * A task that returns a result and may throw an exception.
1.43 + * Implementors define a single method with no arguments called
1.44 + * <tt>call</tt>.
1.45 + *
1.46 + * <p>The <tt>Callable</tt> interface is similar to {@link
1.47 + * java.lang.Runnable}, in that both are designed for classes whose
1.48 + * instances are potentially executed by another thread. A
1.49 + * <tt>Runnable</tt>, however, does not return a result and cannot
1.50 + * throw a checked exception.
1.51 + *
1.52 + * <p> The {@link Executors} class contains utility methods to
1.53 + * convert from other common forms to <tt>Callable</tt> classes.
1.54 + *
1.55 + * @see Executor
1.56 + * @since 1.5
1.57 + * @author Doug Lea
1.58 + * @param <V> the result type of method <tt>call</tt>
1.59 + */
1.60 +public interface Callable<V> {
1.61 + /**
1.62 + * Computes a result, or throws an exception if unable to do so.
1.63 + *
1.64 + * @return computed result
1.65 + * @throws Exception if unable to compute a result
1.66 + */
1.67 + V call() throws Exception;
1.68 +}