Enum Direction {
    UP, DOWN, LEFE, RIGHT
}

public class  {
    public static BufferedImage goodTankU, goodTankD, goodTankR, goodTankL;
    static{
        try {
            goodTankU = ImageIO.read(Tank.class.getClassLoader().getResourceAsStream("images/p1tankU.gif"));
            goodTankD = ImageIO.read(Tank.class.getClassLoader().getResourceAsStream("images/p1tankD.gif"));
            goodTankL = ImageIO.read(Tank.class.getClassLoader().getResourceAsStream("images/p1tankL.gif"));
            goodTankR = ImageIO.read(Tank.class.getClassLoader().getResourceAsStream("images/p1tankR.gif"));
        } catch(IOException e){
            e.printStackTrace();
        }
    }
}

    2):监听键盘按下
    3):监听键盘抬起
*/
public class Tank {
    private static final int SPEED = 5; // 坦克的速度
    private int x, y; //坦克的初始位置
    private Direction direction； // 坦克的方向

    public Tank(int x, int y, Direction direction){
        this.x = x;
        this.y = y;
        this.direction = direction;
    }

    // 1):得到窗口传递的画笔，绘制自己
    public void paint (Graphics g) {
        g.drawImage(ImagesResource.goodTankD, x, y, null);
    }

    // 2):监听键盘按下
    public void keyPressed(KeyEvent e) {

    }
    // 3):监听键盘抬起
    public void keyReleased(KeyEvent e) {

    }
}

// GameFrame的构造器增加监听
public GameFrame (){
    .
    . //省略 .....
    .
    // 键盘监听
    this.addKeyListener(new KeyAdapte(

	public void keyPressed(KeyEvent e) {
            myTank.keyPressed(e);
	}

	@Override
	public void keyReleased(KeyEvent e) {
		myTank.keyReleased(e);
	}

        ));

    // 窗口监听
    this.addWindowListener(new WinodowAdapte(){
        @Override
	public void windowClosing(WindowEvent e) {
            // 关闭进程
            System.exit(0);
        }
    })
}