javax.swing.JComponent 调用顺序

网上截取的，感觉挺有用，记录下来。

http://bbs.csdn.net/topics/310041707

java swing 感觉好复杂啊…………一点都不想用但是作业要用到 >_<;

javax.swing.JComponent类中
repaint()调用update() 
update()调用paint() 
paint()调用paintComponent(),paintBorder(),及paintChildren()

附代码

 1 package com.test;
 2 import java.awt.Color;
 3 import java.awt.Graphics;
 4
 5 import javax.swing.JFrame;
 6 import javax.swing.JPanel;
 7
 8 public class GamePanel extends JPanel{
 9
10     private static final long serialVersionUID = 1L;
11     public GamePanel(){
12
13     }
14
15     public void display(){
16         System.out.println("GmaePanel - display");
17
18         this.repaint();
19     }
20
21     @Override
22     protected void paintComponent(Graphics g) {
23
24         System.out.println("GamePanel - ------------paintComponent");
25
26         g.setColor(new Color(0xcfcfcf));
27     }
28
29     @Override
30     public void paint(Graphics g) {
31         System.out.println("GamePanel - ------------paint");
32         super.paint(g);
33     }
34
35     @Override
36     public void update(Graphics g) {
37         System.out.println("GamePanel - ------------update");
38         super.update(g);
39     }
40
41     public static void main(String[] args){
42         JFrame frame = new JFrame();
43         frame.setSize(300,300);
44         GamePanel gp = new GamePanel();
45         frame.add(gp);
46         frame.setVisible(true);
47         gp.display();
48     }
49 }