import java.awt.Graphics;
import java.awt.Font;
import java.util.Calendar;

public class DigitalClock12 extends java.applet.Applet
    implements Runnable {

    Font theFont = new Font("TimesRoman",Font.BOLD,24);
    Calendar theDate;
    Thread runner;

    public void start() {
        if (runner == null) {
            runner = new Thread(this);
            runner.start();
        }
    }

    public void stop() {
        if (runner != null) {
            runner = null;
        }
    }

    public void run() {
        Thread thisThread = Thread.currentThread();
        while (runner == thisThread) {
            repaint();
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) { }
        }
    }

    public void paint(Graphics screen) {
        theDate = Calendar.getInstance();
        screen.setFont(theFont);
        screen.drawString("" + theDate.getTime(), 10, 50);
    }
}