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| 1 | /* | ||
| 2 | * Copyright (c) 1994, 2005, 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package java.lang; | ||
| 27 | |||
| 28 | /** | ||
| 29 | * The <code>Runnable</code> interface should be implemented by any | ||
| 30 | * class whose instances are intended to be executed by a thread. The | ||
| 31 | * class must define a method of no arguments called <code>run</code>. | ||
| 32 | * <p> | ||
| 33 | * This interface is designed to provide a common protocol for objects that | ||
| 34 | * wish to execute code while they are active. For example, | ||
| 35 | * <code>Runnable</code> is implemented by class <code>Thread</code>. | ||
| 36 | * Being active simply means that a thread has been started and has not | ||
| 37 | * yet been stopped. | ||
| 38 | * <p> | ||
| 39 | * In addition, <code>Runnable</code> provides the means for a class to be | ||
| 40 | * active while not subclassing <code>Thread</code>. A class that implements | ||
| 41 | * <code>Runnable</code> can run without subclassing <code>Thread</code> | ||
| 42 | * by instantiating a <code>Thread</code> instance and passing itself in | ||
| 43 | * as the target. In most cases, the <code>Runnable</code> interface should | ||
| 44 | * be used if you are only planning to override the <code>run()</code> | ||
| 45 | * method and no other <code>Thread</code> methods. | ||
| 46 | * This is important because classes should not be subclassed | ||
| 47 | * unless the programmer intends on modifying or enhancing the fundamental | ||
| 48 | * behavior of the class. | ||
| 49 | * | ||
| 50 | * @author Arthur van Hoff | ||
| 51 | * @see java.lang.Thread | ||
| 52 | * @see java.util.concurrent.Callable | ||
| 53 | * @since JDK1.0 | ||
| 54 | */ | ||
| 55 | public | ||
| 56 | interface Runnable { | ||
| 57 | /** | ||
| 58 | * When an object implementing interface <code>Runnable</code> is used | ||
| 59 | * to create a thread, starting the thread causes the object's | ||
| 60 | * <code>run</code> method to be called in that separately executing | ||
| 61 | * thread. | ||
| 62 | * <p> | ||
| 63 | * The general contract of the method <code>run</code> is that it may | ||
| 64 | * take any action whatsoever. | ||
| 65 | * | ||
| 66 | * @see java.lang.Thread#run() | ||
| 67 | */ | ||
| 68 | public abstract void run(); | ||
| 69 | } | ||