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功能：让坦克运动由我们来控制
内容：添加键盘监听类keyMonitor。
TankClient添加键盘监听器。
针对不同的键改变坦克的位置，与重画线程结合产生不同方向。
一、键盘监听类
private class KeyMonitor extends KeyAdapter{ public void keyPressed(KeyEvent e) { System.out.println("ok"); } }二、键盘监听器 this.addKeyListener(new KeyMonitor());三、不同的键改变坦克位置：（去掉y-=5） int key = e.getKeyCode();
private class KeyMonitor extends KeyAdapter{ public void keyPressed(KeyEvent e) { int key = e.getKeyCode(); switch(key){ case KeyEvent.VK_LEFT: x-=5; break; case KeyEvent.VK_UP: y-=5; break; case KeyEvent.VK_RIGHT: x+=5; break; case KeyEvent.VK_DOWN: y+=5; break; } } } 全部程序： public class TankClient extends Frame { public static final int GAME_WIDTH =800; public static final int GAME_HEIGHT =800; int x = 30; int y = 30; //定义在方法外面 Image offScreenImage = null; public void paint(Graphics g) { Color c = g.getColor(); g.setColor(Color.RED); g.fillOval(x, y, 30, 40); g.setColor(c); //y += 5; } public void update(Graphics g) { if(offScreenImage == null){ offScreenImage = this.createImage(GAME_WIDTH,GAME_HEIGHT); } Graphics gOffScreen = offScreenImage.getGraphics(); Color c = gOffScreen.getColor(); gOffScreen.setColor(Color.GREEN); gOffScreen.fillRect(0, 0, 800, 600); gOffScreen.setColor(c); print(gOffScreen); g.drawImage(offScreenImage, 0, 0, null); } public void lauchFrame(){ this.setSize(GAME_WIDTH,GAME_HEIGHT); this.setTitle("TankWar"); this.setLocation(80, 60); this.setVisible(true); this.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e) { System.exit(0); } }); this.setResizable(false); new Thread(new paintThread()).start(); this.addKeyListener(new KeyMonitor()); } public static void main(String[] args) { TankClient tc = new TankClient(); tc.lauchFrame(); } private class paintThread implements Runnable { //线程 内部类 为此线程服务 public void run() { while(true){ repaint(); try { Thread.sleep(50); } catch (Exception e) { e.printStackTrace(); } } } } private class KeyMonitor extends KeyAdapter{ public void keyPressed(KeyEvent e) { int key = e.getKeyCode(); switch(key){ case KeyEvent.VK_LEFT: x-=5; break; case KeyEvent.VK_UP: y-=5; break; case KeyEvent.VK_RIGHT: x+=5; break; case KeyEvent.VK_DOWN: y+=5; break; } } } } 转载地址：http://ulrxb.baihongyu.com/