import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
import javax.swing.Timer;
 
public class ShowingTime
{
    public static void main(String[] args)
    {
        final DateFormat df = new SimpleDateFormat("hh:mm:ss a z");
        Calendar calendar = Calendar.getInstance();
        df.setCalendar(calendar);
        Date now = new Date();
        final JLabel timeLabel = new JLabel("time: " +
                                     df.format(now), JLabel.CENTER);
        new Timer(1000, new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                timeLabel.setText("time: " + df.format(new Date()));
                timeLabel.revalidate();
                timeLabel.repaint();
            }
        }).start();
        JPanel panel = new JPanel();
        panel.add(timeLabel);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(panel);
        f.setSize(400,200);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}