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import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.Timer;
public class TimerChangeButtonBackground extends JFrame {
boolean flag = false;
JButton button = new JButton("Click to stop");
Timer timer;
public TimerChangeButtonBackground() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
getContentPane().add(button, "Center");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
timer.stop();
button.setBackground(Color.red);
}
});
timer = new Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
button.setBackground(flag ? Color.green : Color.yellow);
flag = !flag;
repaint();
}
});
timer.start();
pack();
setVisible(true);
}
public static void main(String arg[]) {
new TimerChangeButtonBackground();
}
}
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