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

package com.test;
import java.awt.Color;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class GamePanel extends JPanel{

    private static final long serialVersionUID = 1L;
    public GamePanel(){
    
    }

    public void display(){    
        System.out.println("GmaePanel - display");
        
        this.repaint();
    }

    @Override
    protected void paintComponent(Graphics g) {
        
        System.out.println("GamePanel - ------------paintComponent");
        
        g.setColor(new Color(0xcfcfcf));    
    }    
    
    @Override
    public void paint(Graphics g) {
        System.out.println("GamePanel - ------------paint");
        super.paint(g);
    }

    @Override
    public void update(Graphics g) {
        System.out.println("GamePanel - ------------update");
        super.update(g);
    }

    public static void main(String[] args){
        JFrame frame = new JFrame();
        frame.setSize(300,300);
        GamePanel gp = new GamePanel();
        frame.add(gp);
        frame.setVisible(true);
        gp.display();
    }
}