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package horstmann.ch04_timer;
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.util.Date;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.Timer;
/**
This program shows a clock that is updated once per second.
*/
public class TimerTester
{
public static void main(String[] args)
{
JFrame frame = new JFrame();
final int FIELD_WIDTH = 20;
final JTextField textField = new JTextField(FIELD_WIDTH);
frame.setLayout(new FlowLayout());
frame.add(textField);
ActionListener listener = event -> {
Date now = new Date();
textField.setText(now.toString());
};
final int DELAY = 1000;
// Milliseconds between timer ticks
Timer t = new Timer(DELAY, listener);
t.start();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}
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