Java坦克大战游戏教程：从入门到精通

import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.List;

public class TankWar extends Frame {

    public static final int GAME_WIDTH = 800;
    public static final int GAME_HEIGHT = 600;

    Tank myTank = new Tank(this, 50, 50);
    Image offScreenImage = null;

    List<Missile> missiles = new ArrayList<Missile>();

    public void launch() {
        setLocation(111, 111);
        setSize(GAME_WIDTH, GAME_HEIGHT);
        setTitle('Tank War');
        setResizable(false);
        setBackground(Color.lightGray);
        this.addKeyListener(new KeyMonitor());

        setVisible(true);
        new Thread(new PaintThread()).start();
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent arg0) {
                System.exit(0);
            }
        });
    }

    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.blue);
        gOffScreen.fillRect(0, 0, GAME_WIDTH, GAME_HEIGHT);
        gOffScreen.setColor(c);
        paint(gOffScreen);
        g.drawImage(offScreenImage, 0, 0, null);
    }

    public static void main(String[] args) {
        TankWar tc = new TankWar();
        tc.launch();
    }

    public void paint(Graphics g) {
        g.drawString('Missiles count: ' + missiles.size(), 10, 50);

        for (int i = 0; i < missiles.size(); i++) {
            Missile m = missiles.get(i);
            m.draw(g);
        }
        myTank.draw(g);
    }

    class PaintThread implements Runnable {
        public void run() {
            while (true) {
                repaint();
                try {
                    Thread.sleep(25);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    class KeyMonitor extends KeyAdapter {
        public void keyPressed(KeyEvent e) {
            myTank.keyPressed(e);
        }

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