java 画图

package com.game;
import java.awt.*;
import javax.swing.*;
public class Pro_1 extends JFrame {
    public static MyPanel mp=null;
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
         Pro_1 pro_1 = new Pro_1();
         pro_1.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
         mp = new MyPanel();
         pro_1.add(mp);
         pro_1.setSize(new Dimension(400,300));
         pro_1.setTitle("Demo");
         pro_1.setVisible(true);
    }
}

class MyPanel extends Panel{
    public void paint(Graphics g){
        super.paint(g);
        g.drawOval(10, 10, 50, 50);
        g.setColor(Color.blue);
        g.setFont(new Font("华文彩云1",Font.BOLD,40));
        g.drawImage(Toolkit.getDefaultToolkit().getImage("./loginbtn.jpg"), 60, 60, 85, 32,this);
        g.drawString("hi,你好",40,50);
    }
}