reminderbeep.java

初级学习资料必读本

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

/**
 * Simple demo that uses java.util.Timer to schedule a task to execute
 * once 5 seconds have passed.
 */

public class ReminderBeep {
    Toolkit toolkit;
    Timer timer;

    public ReminderBeep(int seconds) {
	toolkit = Toolkit.getDefaultToolkit();
        timer = new Timer();
        timer.schedule(new RemindTask(), seconds*1000);
    }

    class RemindTask extends TimerTask {
        public void run() {
            System.out.println("Time's up!");
	    toolkit.beep();
	    //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 ReminderBeep(5);
	System.out.println("Task scheduled.");
    }
}