/** * Copyright 2005 The Apache Software Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *     http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package org.apache.hadoop.util;/** A thread that has called {@link Thread#setDaemon(boolean) } with true.*/public class Daemon extends Thread {  {    setDaemon(true);                              // always a daemon  }  Runnable runnable = null;  /** Construct a daemon thread. */  public Daemon() {    super();  }  /** Construct a daemon thread. */  public Daemon(Runnable runnable) {    super(runnable);    this.runnable = runnable;    this.setName(((Object)runnable).toString());  }  public Runnable getRunnable() {    return runnable;  }}