Annoying Beep

package com.sun.example;
 
/* From http://java.sun.com/docs/books/tutorial/index.html */
/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
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 * Redistribution and use in source and binary forms, with or without modification, are permitted
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 * -Redistribution of source code must retain the above copyright notice, this list of conditions
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 * -Redistribution 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.
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 * Neither the name of Sun Microsystems, Inc. or the names of contributors may be used to endorse or
 * promote products derived from this software without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL EXPRESS OR IMPLIED
 * CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC.
 * ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
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 */
import java.awt.Toolkit;
import java.util.Timer;
import java.util.TimerTask;
 
/**
 * Schedule a task that executes once every second.
 */
 
public class AnnoyingBeep {
    Toolkit toolkit;
 
    Timer timer;
 
    public AnnoyingBeep() {
	toolkit = Toolkit.getDefaultToolkit();
	timer = new Timer();
	timer.schedule(new RemindTask(), 0, // initial delay
		1 * 1000); // subsequent rate
    }
 
    class RemindTask extends TimerTask {
	int numWarningBeeps = 3;
 
	public void run() {
	    if (numWarningBeeps > 0) {
		toolkit.beep();
		System.out.println("Beep!");
		numWarningBeeps--;
	    } else {
		toolkit.beep();
		System.out.println("Time's up!");
		// timer.cancel(); //Not necessary because we call System.exit
		System.exit(0); // Stops the AWT thread (and everything else)
	    }
	}
    }
 
    public static void main(String args[]) {
	System.out.println("About to schedule task.");
	new AnnoyingBeep();
	System.out.println("Task scheduled.");
    }
}