一、代碼如下

package www.tainiu.gui__V2;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Vector;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class af__TankGame__V2 extends JFrame{

	myPanel_V2 mp= null;

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		af__TankGame__V2 tv= new af__TankGame__V2();

	}
	
	public af__TankGame__V2() {
		// TODO Auto-generated constructor stub
		mp = new myPanel_V2();
		this.add(mp);

		this.setSize(400, 300);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
		//綁定監聽
		this.addKeyListener(mp);
	}

}





class Tank_V2 {
	int x = 0;
	int y = 0;
	int direct= 1;
	int speed= 20;
	
	public Tank_V2(int x, int y) {
		// TODO Auto-generated constructor stub
		this.x = x;
		this.y = y;
	}
}

//敵人坦克
class DRTank extends Tank_V2{

	public DRTank(int x, int y) {
		super(x, y);
		// TODO Auto-generated constructor stub
	}
	
}



//自己坦克
class Hero_V2 extends Tank_V2 {
		public Hero_V2(int x, int y) {
			// TODO Auto-generated constructor stub
			super(x, y);
		}
}

class myPanel_V2 extends JPanel implements KeyListener {
	Hero_V2 hero = null;
	
	//DRTank drt= null;
	Vector<DRTank> dts= new Vector<>();
	int dtsSize= 3;
	public myPanel_V2() {
		// TODO Auto-generated constructor stub
		hero = new Hero_V2(10, 10);
		for(int i=0; i<dtsSize; i++) {
			DRTank dt= new DRTank((i+1)*50, 0);
			dts.add(dt);
		}
	}

	@Override
	public void paint(Graphics g) {
		// TODO Auto-generated method stub
		super.paint(g);
		//g.setColor(Color.yellow);
		//g.drawRect(hero.x, hero.y , 5, 30);
		//g.setColor(Color.CYAN);
		g.fillRect(0, 0, 400, 300);
		g.setColor(Color.CYAN);
		
//		g.fill3DRect(hero.x, hero.y, 5, 30, false);
//		g.fill3DRect(hero.x+15, hero.y, 5, 30, false);
//		g.fill3DRect(hero.x+5, hero.y+15, 10, 20, false);
//		g.fillOval(hero.x+4, hero.y+20, 10, 10);
//		g.drawLine(hero.x+10, hero.y+20, hero.x+10, 60);
		//畫出自己的坦克
		this.drawTank(hero.x, hero.y, g, hero.direct, 0);
		//畫出敵人坦克
		for(int i=0; i<dtsSize; i++) {
			this.drawTank(dts.get(i).x, dts.get(i).y, g, 1, 1);
		}

	}
	
	private void drawTank(int x, int y, Graphics g, int derict, int type) {
		// TODO Auto-generated method stub
		switch (type) {
		case 0://自己坦克
			g.setColor(Color.CYAN);
			break;
        case 1://敵人坦克
        	g.setColor(Color.yellow);			
			break;
		default:
			break;
		}
		
		switch (derict) {
		case 1://方向想下
			g.fill3DRect(x, y, 5, 30, false);
			g.fill3DRect(x+15, y, 5, 30, false);
			g.fill3DRect(x+5, y+15, 10, 20, false);
			g.fillOval(x+4, y+20, 10, 10);
			g.drawLine(x+10, y+20, x+10, y+60);
			break;

		case 2://方向想左
			g.fill3DRect(x, y, 30, 5, false);
			g.fill3DRect(x, y+15, 30, 5, false);
			g.fill3DRect(x+15, y+5, 20, 10, false);
			g.fillOval(x+15, y+5, 10, 10);
			g.drawLine(x+17, y+10, x-19, y+10);
			break;
		case 3://方向想上
			g.fill3DRect(x, y, 5, 30, false);
			g.fill3DRect(x+15, y, 5, 30, false);
			g.fill3DRect(x+5, y+15, 10, 20, false);
			g.fillOval(x+4, y+20, 10, 10);
			g.drawLine(x+10, y+20, x+10, y-20);
			break;
		case 4://方向想右
			g.fill3DRect(x, y, 30, 5, false);
			g.fill3DRect(x, y+15, 30, 5, false);
			g.fill3DRect(x+15, y+5, 20, 10, false);
			g.fillOval(x+15, y+5, 10, 10);
			g.drawLine(x+17, y+10, x+45, y+10);
			break;
		}

	}

	@Override
	public void keyTyped(KeyEvent e) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void keyPressed(KeyEvent e) {
		// TODO Auto-generated method stub
		//System.out.println("pp");
		if(e.getKeyCode() == KeyEvent.VK_A) {
			this.hero.x -= this.hero.speed;
			this.hero.direct= 2;
		}else if(e.getKeyCode() == KeyEvent.VK_D) {
			this.hero.x += this.hero.speed;
			this.hero.direct= 4;
		}else if(e.getKeyCode() == KeyEvent.VK_W) {
			this.hero.y -= this.hero.speed;
			this.hero.direct= 3;
		}else if(e.getKeyCode() == KeyEvent.VK_S) {
			this.hero.y += this.hero.speed;
			this.hero.direct= 1;
		}
		
		this.repaint();
	}

	@Override
	public void keyReleased(KeyEvent e) {
		// TODO Auto-generated method stub
		
	}
}

畫坦克__敵人坦克