java坦克雏形

package cn.skyour.tank;
import java.awt.*;

public class Tank {

public static void main(String[] args) {
    Frame w = new Frame();
    w.setSize(1024, 768);

// w.setBackground(Color.BLACK);

    MyPanel mp = new MyPanel();
    w.add(mp);
    Thread t = new Thread(mp);
    t.start();
    w.show();
}

}
class MyPanel extends Panel implements Runnable{

int x[] = new int[3];
int y[] = new int[3];
public MyPanel(){
    for(int i=0;i<1;i++){
        x[i]=505;
        y[i]=500;
    }
}
public void paint(Graphics g){
    int x1=480;
    int y1=510;
    //坦克
    g.fillRect(x1+20, y1+0, 20, 20);
    //炮筒
    g.fillRect(x1+0,y1+20 , 60, 20);
    //身体
    g.fillRect(x1+0,y1+40, 20, 20);
    //左腿
    g.fillRect(x1+40, y1+40, 20, 20);
    
    //右腿
    
    for(int i=0;i<1;i++){
        g.drawString("●", x[i], y[i]);
    }
}
public void run(){
    while(true){
        try{
            for(int i=0; i<1;i++){
                y[i]--;
                if(y[i]<0){
                    y[i]=510;
                }
            }
            Thread.sleep(300);
        }catch(Exception e){
            
        }
        repaint();
    }
}

}