sleep.java

有关java 的p2p应用,是一般很好的教程,有兴趣的朋友应该好好阅读一下

/*
 * Copyright (c) 2003 Sun Microsystems, Inc.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *       Sun Microsystems, Inc. for Project JXTA."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact Project JXTA at http://www.jxta.org.
 *
 * 5. Products derived from this software may not be called "JXTA",
 *    nor may "JXTA" appear in their name, without prior written
 *    permission of Sun.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL SUN MICROSYSTEMS OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Project JXTA.  For more
 * information on Project JXTA, please see
 * <http://www.jxta.org/>.
 *
 * This license is based on the BSD license adopted by the Apache Foundation.
 *
 * $Id: sleep.java,v 1.1 2003/02/18 00:00:20 lomax Exp $
 */

package net.jxta.impl.shell.bin.sleep;

import java.io.*;
import net.jxta.impl.shell.*;


/**
 * sleep
 * @version     $Revision: 1.1 $
 * @since       JXTA 1.0
 */

public class sleep extends ShellApp {

    public sleep() {
    }

    public void stopApp () {
    }

    public int startApp (String[] args) {

	if ((args == null) || (args.length != 1)) {
	    println ("Syntax error:");
	    println (syntax());
	    return ShellApp.appMiscError;
	}
        try {
	    long timeout = Long.parseLong (args[0]);
	    Thread.sleep (timeout);
	    return ShellApp.appNoError;
	} catch (Exception ez1) {
	    println ("Syntax error:");
	    println (syntax());
	    return ShellApp.appMiscError;
	}
    }
  

    private String syntax() {
        return "sleep milliseconds";
    }

    public String getDescription() {
        return "Sleep for a specified amount of milliseconds";
    }

    public void help() {
        println("NAME");
        println("      Sleep for a specified amount of milliseconds");
        println("");
        println("SYNOPSIS");
        println("");
        println("     " + syntax());
        println("");
        println("DESCRIPTION");
        println("");
	println("sleep sleeps for the specified amount of milliseconds");
        println("");
    }
}