1 import java.awt.Graphics;
2 import java.awt.event.ActionEvent;
3 import java.awt.event.ActionListener;
4
5 import javax.swing.*;
6
7
8
9 public class Test_16_16 extends JFrame{
10
11 public Test_16_16(){
12 add(new JP());
13 }
14 public static void main(String[] args) {
15 // TODO Auto-generated method stub
16 Test_16_16 frame = new Test_16_16();
17 frame.setSize(300,220);
18 frame.setTitle("Test_16_16");
19 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
20 frame.setLocationRelativeTo(null); // Center the frame
21 frame.setVisible(true);
22 }
23
24 static class JP extends JPanel{
25 private boolean visi = true;
26
27 public JP(){
28 Timer timer = new Timer(1000,new TimerListener());
29 timer.start();
30 }
31 protected void paintComponent(Graphics g){
32 super.paintComponent(g);
33 if(visi == true)
34 g.drawImage(new ImageIcon("image/flag4.gif").getImage(), 0, 0, this);
35 }
36 class TimerListener implements ActionListener{
37
38 @Override
39 public void actionPerformed(ActionEvent arg0) {
40 // TODO Auto-generated method stub
41 if(visi == true) visi = false;
42 else visi = true;
43 repaint();
44 }
45
46 }
47 }
48 }
