import java.util.Timer;import java.util.TimerTask;import java.awt.Toolkit;/** * Schedule a task that executes once every second. */public class SkippingBeep {    Toolkit toolkit;    Timer timer;    public SkippingBeep() {	toolkit = Toolkit.getDefaultToolkit();        timer = new Timer();        timer.scheduleAtFixedRate(new RemindTask(),	               0,        //initial delay	               1*1000);  //subsequent rate    }    class RemindTask extends TimerTask {	int numWarningBeeps = 3;        public void run() {	    if (numWarningBeeps-- > 0) {	        long time = System.currentTimeMillis();	        if (time - scheduledExecutionTime() > 5) {	            return;	        }		//If it's not too late, beep.	        toolkit.beep();		System.out.println("Beep!");	    } 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 SkippingBeep();	System.out.println("Task scheduled.");    }}