import java.util.Timer;
import java.util.TimerTask;
import java.awt.Toolkit;

public class AnnoyingBeep {
    Toolkit toolkit;
    Timer timer;

    public static void main(String[] args){
	AnnoyingBeep annoy = new AnnoyingBeep();
    }

    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)
            }
        }
    }
}