java 如何重画直线

Question

import java.io.*; 
import javax.swing.*; 
public class Test extends JFrame{ 
public static void main(String[] args){ 
      new Test().init(); 
              } 
              public void init(){ 
              setSize(600,400); 
              setVisible(true);       addWindowListener(new WindowAdapter(){ 
            public void windowClosing(WindowEvent e){ 
            System.exit(0); 
            } 
            }); 
            } 
            public void paint(Graphics g){ 
            super.paint(g); 
            g.drawLine(267,114,26,114);} 
} 
现在能画一条直线 如何去重画直线..
小弟新手　能给写的详细些吗？

Answer 1

在 addWindowListener 之后再加上以下代码:
        addComponentListener(new ComponentAdapter(){
            public void componentResized(ComponentEvent e){
                if(isShowing()){
                    repaint(); 
                }                
            }            
        });

Answer 2

再罗嗦两句吧.
JFrame被设计用来作为高层次容器,你现在直接在上面画东西,是个很不好的习惯.影响性能,