问ecplise图形窗口黑屏怎么办？

package 图形界面;

import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;


import javax.swing.JFrame;

public class JameFrame extends JFrame{
    
    public void paint(Graphics g) {
            g.drawLine(10, 20, 50, 40);
            g.drawRect(30, 30,100, 100);
        }
public void chushihuaFrame(){
    this.setTitle("我的游戏");
    this.setVisible(true);//窗口默认是不可见的,true是可见的
    this.setSize(500, 500);
    this.setLocation(350, 150);
    this.addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent e) {
            System.exit(0);
        }
    }) ;
}