java绘图,画坦克

/**
 * 功能:画出坦克
 */
package com.tank;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.*;
     
public class myTankGame1 extends JFrame{
    public static void main(String[] args){
        myTankGame1 myt1=new myTankGame1();
                    
    }
    public myTankGame1(){
        MyPanel myp=new MyPanel();
        this.add(myp);
        this.setTitle("坦克大战!");
        this.setSize(400,300);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }
}
     
class MyPanel extends JPanel{
    hero myhero;
    public MyPanel(){
        myhero=new hero(10, 10);
    }
         
    //重写paint()函数
    public void paint(Graphics g){
        super.paint(g);
        g.fillRect(0, 0, 400, 300);
        this.drawTank(myhero.getX(), myhero.getY(), g, 0, 0);
            
        //this.drawTank(myhero.getX()+40, myhero.getY(), g, 0, 0);
    }
    //画出坦克
    public void drawTank(int x,int y,Graphics g,int derect,int type){
        switch (type){
            case 0:
                g.setColor(Color.cyan);
                break;
            case 1:
                g.setColor(Color.yellow);
                break;
        }
        switch(derect){
            case 0:
                //坦克方向向上
                //画出我的坦克，到时再封装到函数中
                //画出坦克左侧的方框
                g.fill3DRect(x, y, 5, 30,false);
                //画出
                g.fill3DRect(x+15, y, 5, 30,false);
                g.fill3DRect(x+5, y+5, 10, 20,false);
                g.setColor(Color.gray);
                g.fillRoundRect(x+6, y+11, 7, 7, 200, 200);
                //画出线
                g.drawLine(x+9, y-6, x+9, y+15);
                break;
        }
    }
        
}
//坦克类
class Tank{
    //坦克的横坐标
    int x=0;
    //坦克的纵坐标
    int y=0;
    public Tank(int x,int y){
        this.x=x;
        this.y=y;
    }
    public int getX(){
        return this.x;
    }
    public int getY(){
        return this.y;
    }
}
//我的坦克
class hero extends Tank{
    public hero(int x,int y){
        super(x,y);
    }
}