Program in Java

import java.awt.*;
import java.util.*;
 
public class Showtime extends Frame implements Runnable {
    Button quitBtn;
    Label  timeLbl;
    Thread tthread;
 
    public Showtime() {
        super("Java Showtime");
        setLayout(new FlowLayout());
        quitBtn = new Button("Quit");
        timeLbl = new Label((new Date()).toString());
        add(quitBtn);   add(timeLbl);
        pack();
        show();
        tthread = new Thread(this);
        tthread.run();
    }
 
    public boolean action(Event evt, Object what) {
        if (evt.target == quitBtn) {
                tthread.stop();
                System.exit(0);
        }
        return super.action(evt,what);
    }
 
    public void run() {
        while(true) {
                try { Thread.sleep(10000); } 
                catch (Exception e) { }
                timeLbl.setText((new Date()).toString());
        }
    }
 
    public static void main(String [] argv) {
        Showtime st = new Showtime();
    }
}