repaint和paintComponent的问题，急~~~

[hn1232]

package com.test;

import java.awt.Graphics;
import javax.swing.JPanel;


public class GamePanel extends JPanel{

private static final long serialVersionUID = 1L;


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

@Override
protected void paintComponent(Graphics g) {
System.out.println("paintComponent");
}


public static void main(String[] args){
GamePanel gamePanel = new GamePanel();
gamePanel.display();
}
}


repaint()方法不是会自动调用paintComponent方法吗？为什么我的上面一段程序，不调用paintComponent（）方法呢？
请高手指教，先谢谢了~

[hn1232]

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

自己搞定了，因为上面的代码，根本就没有开始显示JPanel，既然没有显示，怎么会调用paintComponent（）呢？
可以试试，调试下面一段代码用于理解~

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();
	}
}

[hn1232]

没人回吗？自己顶下！

[hn1232]

额……这个……没分就没人答吗?^

[xiaop0817]

看源码就知道了嘛~~

[hn1232]

[Quote=引用 3 楼 xiaop0817 的回复:]
看源码就知道了嘛~~
[/Quote]
嗯……没看明白呢……