封裝方法繪制4個方向，分敵我的坦克（與上節比較更改MyPanel類即可） Test.java ~~~ package tkdz; import javax.swing.*; import java.awt.*; public class Test extends JFrame{ MyPanel mp =null; public static void main(String[] args){ Test t1 =new Test(); } public Test(){ mp =new MyPanel();//面板 this.add(mp); this.setSize(400,300); this.setLocation(300, 280); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); } } ~~~ Tank.java ~~~ package tkdz; public class Tank { int x=0,y=0; public int getX() { return x; } public void setX(int x) { this.x = x; } public int getY() { return y; } public void setY(int y) { this.y = y; } public Tank(int x, int y) { super(); this.x = x; this.y = y; } } ~~~ MyTank.java ~~~ package tkdz; public class MyTank extends Tank{ public MyTank(int x, int y) { super(x, y); // TODO Auto-generated constructor stub } } ~~~ MyPanel.java ~~~ package tkdz; import java.awt.*; import javax.swing.*; public class MyPanel extends JPanel{ MyTank mt=null; public MyPanel(){ mt=new MyTank(100,100); //mt1=new MyTank(300,100);雙人游戲 } public void paint(Graphics g){ super.paint(g); g.fillRect(0, 0, 400, 300);//背景？ this.drawTank(mt.getX(), mt.getY(), g, 1, 1); } public void drawTank(int x,int y,Graphics g,int fangxiang,int leixing) { switch(leixing) { case 0://我的坦克 g.setColor(Color.yellow); break; case 1://敵人的坦克 g.setColor(Color.green); break; } switch(fangxiang) { case 0://上 g.fill3DRect(x, y, 5, 30,false); g.fill3DRect(x+15,y , 5, 30,false); g.fill3DRect(x+5,y+5 , 10, 20,false); g.fillOval(x+5, y+10, 10, 10); g.drawLine(x+10, y+15, x+10, y-3); break; case 1://左 g.fill3DRect(x, y, 30, 5,false); g.fill3DRect(x, y+15, 30, 5, false); g.fill3DRect(x+5, y+5, 20, 10, false); g.fillOval(x+10, y+5, 10, 10); g.drawLine(x+15, y+10, x-3, y+10); break; case 2://下 g.fill3DRect(x, y, 5, 30,false); g.fill3DRect(x+15,y , 5, 30,false); g.fill3DRect(x+5,y+5 , 10, 20,false); g.fillOval(x+5, y+10, 10, 10); g.drawLine(x+10, y+15, x+10, y+33); break; case 3://右 g.fill3DRect(x, y, 30, 5,false); g.fill3DRect(x, y+15, 30, 5, false); g.fill3DRect(x+5, y+5, 20, 10, false); g.fillOval(x+10, y+5, 10, 10); g.drawLine(x+15, y+10, x+33, y+10); break; } this.repaint(); } } ~~~