import java.util.Timer;
import java.util.TimerTask;
 
/**
 *
 * @author Mike
 */
 
public class ExitJoke extends javax.swing.JFrame {
 
    Timer timer;
 
    public ExitJoke(int seconds) {
       this.setLocationRelativeTo(null);
 
        timer = new Timer();
 
        timer.schedule(new RemindTask(), seconds * 1000);
    }
 
    class RemindTask extends TimerTask {
 
        public void run() {
System.out.println ( "Time's up!" ) ;
 
 
            timer.cancel(); //Terminate the timer thread
            System.exit(0);
 
 
 
        }
    }
 
    /** Creates new form ExitJoke */
    public ExitJoke() {
        initComponents();
    }
private void btnJokeActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
    }
 
    public static void main(String args[]) {
                               System.out.println ( "About to schedule task." ) ;
         new ExitJoke ( 2 ) ;//Time in seconds.
 
 
         System.out.println ( "Task scheduled." ) ;
 
        java.awt.EventQueue.invokeLater(new Runnable() {
 
            public void run() {
                new ExitJoke().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton btnJoke;
    private javax.swing.JPanel jPanel1;
    // End of variables declaration
}

System.exit(0);