The Timer Class
The Timer class provides a mechanism to generate timed events. It has properties and events, and thus can be used in application builders that understand JavaBeans. It fires an ActionEvent at a given time. The timer can be set to repeat, and an optional initial delay can be set before the repeating event starts.
import javax.swing.*;
import javax.swing.Timer;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.*;
class ClockLabel extends JLabel implements ActionListener {
public ClockLabel() {
super("" + new Date());
Timer t = new Timer(1000, this);
t.start();
}
@Override
public void actionPerformed(ActionEvent e) {
setText((new Date()).toString());
}
}
public class ClockTest extends JFrame {
public ClockTest() {
super("Timer Demo");
setSize(300, 100);
setDefaultCloseOperation(EXIT_ON_CLOSE);
ClockLabel clock = new ClockLabel();
getContentPane().add(clock, BorderLayout.NORTH);
}
public static void main(String args[]) {
ClockTest ct = new ClockTest();
ct.setVisible(true);
}
}
