Java打飞机小游戏（附完整源码）

import java.awt.Font; 

import java.awt.Color; 

import java.awt.Graphics; 

import java.awt.event.MouseAdapter; 

import java.awt.event.MouseEvent; 

import java.util.Arrays; 

import java.util.Random; 

import java.util.Timer; 

import java.util.TimerTask; 

import java.awt.image.BufferedImage; 

import javax.imageio.ImageIO; 

import javax.swing.ImageIcon; 

import javax.swing.JFrame; 

import javax.swing.JPanel; 

public class ShootGame extends JPanel { 

    public static final int WIDTH = 400; // 面板宽 

    public static final int HEIGHT = 654; // 面板高 

    /** 游戏的当前状态: START RUNNING PAUSE GAME_OVER */ 

    private int state; 

    private static final int START = 0; 

    private static final int RUNNING = 1; 

    private static final int PAUSE = 2; 

    private static final int GAME_OVER = 3; 

    private int score = 0; // 得分 

    private Timer timer; // 定时器 

    private int intervel = 1000 / 100; // 时间间隔(毫秒) 

    public static BufferedImage background; 

    public static BufferedImage start; 

    public static BufferedImage airplane; 

    public static BufferedImage bee; 

    public static BufferedImage bullet; 

    public static BufferedImage hero0; 

    public static BufferedImage hero1; 

    public static BufferedImage pause; 

    public static BufferedImage gameover; 

    private FlyingObject[] flyings = {}; // 敌机数组 

    private Bullet[] bullets = {}; // 子弹数组 

    private Hero hero = new Hero(); // 英雄机 

    static { // 静态代码块，初始化图片资源 

        try { 

            background = ImageIO.read(ShootGame.class 

                    .getResource("background.png")); 

            start = ImageIO.read(ShootGame.class.getResource("start.png")); 

            airplane = ImageIO 

                    .read(ShootGame.class.getResource("airplane.png")); 

            bee = ImageIO.read(ShootGame.class.getResource("bee.png")); 

            bullet = ImageIO.read(ShootGame.class.getResource("bullet.png")); 

            hero0 = ImageIO.read(ShootGame.class.getResource("hero0.png")); 

            hero1 = ImageIO.read(ShootGame.class.getResource("hero1.png")); 

            pause = ImageIO.read(ShootGame.class.getResource("pause.png")); 

            gameover = ImageIO 

                    .read(ShootGame.class.getResource("gameover.png")); 

        } catch (Exception e) { 

            e.printStackTrace(); 

        } 

    } 

    /** 画 */ 

    @Override 

    public void paint(Graphics g) { 

        g.drawImage(background, 0, 0, null); // 画背景图 

        paintBullets(g); // 画子弹 

        paintFlyingObjects(g); // 画飞行物 

        paintState(g); // 画游戏状态 

    } 

    /** 画英雄机 */ 

    public void paintHero(Graphics g) { 

        g.drawImage(hero.getImage(), hero.getX(), hero.getY(), null); 

    } 

    /** 画子弹 */ 

    public void paintBullets(Graphics g) { 

        for (int i = 0; i < bullets.length; i++) { 

            Bullet b = bullets[i]; 

            g.drawImage(b.getImage(), b.getX() - b.getWidth() / 2, b.getY(), 

                    null); 

        } 

    } 

    /** 画飞行物 */ 

    public void paintFlyingObjects(Graphics g) { 

        for (int i = 0; i < flyings.length; i++) { 

            FlyingObject f = flyings[i]; 

            g.drawImage(f.getImage(), f.getX(), f.getY(), null); 

        } 

    } 

    /** 画分数 */ 

    public void paintScore(Graphics g) { 

        int x = 10; // x坐标 

        int y = 25; // y坐标 

        Font font = new Font(Font.SANS_SERIF, Font.BOLD, 22); // 字体 

        g.setColor(new Color(0xFF0000)); 

        g.setFont(font); // 设置字体 

        g.drawString("SCORE:" + score, x, y); // 画分数 

        y=y+20; // y坐标增20 

        g.drawString("LIFE:" + hero.getLife(), x, y); // 画命 

    } 

    /** 画游戏状态 */ 

    public void paintState(Graphics g) { 

        switch (state) { 

        case START: // 启动状态 

            g.drawImage(start, 0, 0, null); 

            break; 

        case PAUSE: // 暂停状态 

            g.drawImage(pause, 0, 0, null); 

            break; 

        case GAME_OVER: // 游戏终止状态 

            g.drawImage(gameover, 0, 0, null); 

            break; 

        } 

    } 

    public static void main(String[] args) { 

        JFrame frame = new JFrame("Fly"); 

        ShootGame game = new ShootGame(); // 面板对象 

        frame.add(game); // 将面板添加到JFrame中 

        frame.setSize(WIDTH, HEIGHT); // 设置大小 

        frame.setAlwaysOnTop(true); // 设置其总在最上 

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 默认关闭操作 

        frame.setIconImage(new ImageIcon("images/icon.jpg").getImage()); // 设置窗体的图标 

        frame.setLocationRelativeTo(null); // 设置窗体初始位置 

        frame.setVisible(true); // 尽快调用paint 

        game.action(); // 启动执行 

    } 

    /** 启动执行代码 */ 

    public void action() { 

        // 鼠标监听事件 

        MouseAdapter l = new MouseAdapter() { 

            @Override 

            public void mouseMoved(MouseEvent e) { // 鼠标移动 

                if (state == RUNNING) { // 运行状态下移动英雄机--随鼠标位置 

                    int x = e.getX(); 

                    int y = e.getY(); 

                    hero.moveTo(x, y); 

                } 

            } 

            @Override 

            public void mouseEntered(MouseEvent e) { // 鼠标进入 

                if (state == PAUSE) { // 暂停状态下运行 

                    state = RUNNING; 

                } 

            } 

            @Override 

            public void mouseExited(MouseEvent e) { // 鼠标退出 

                if (state == RUNNING) { // 游戏未结束，则设置其为暂停 

                    state = PAUSE; 

                } 

            } 

            @Override 

            public void mouseClicked(MouseEvent e) { // 鼠标点击 

                switch (state) { 

                case START: 

                    state = RUNNING; // 启动状态下运行 

                    break; 

                case GAME_OVER: // 游戏结束，清理现场 

                    flyings = new FlyingObject[0]; // 清空飞行物 

                    bullets = new Bullet[0]; // 清空子弹 

                    hero = new Hero(); // 重新创建英雄机 

                    score = 0; // 清空成绩 

                    state = START; // 状态设置为启动 

                    break; 

                } 

            } 

        }; 

        this.addMouseListener(l); // 处理鼠标点击操作 

        this.addMouseMotionListener(l); // 处理鼠标滑动操作 

        timer = new Timer(); // 主流程控制 

        timer.schedule(new TimerTask() { 

            @Override 

            public void run() { 

                if (state == RUNNING) { // 运行状态 

                    enterAction(); // 飞行物入场 

                    stepAction(); // 走一步 

                    shootAction(); // 英雄机射击 

                    bangAction(); // 子弹打飞行物 

                    outOfBoundsAction(); // 删除越界飞行物及子弹 

                    checkGameOverAction(); // 检查游戏结束 

                } 

                repaint(); // 重绘，调用paint()方法 

            } 

        }, intervel, intervel); 

    } 

    /** 飞行物入场 */ 

    public void enterAction() { 

        flyEnteredIndex++; 

        if (flyEnteredIndex % 40 == 0) { // 400毫秒生成一个飞行物--10*40 

            FlyingObject obj = nextOne(); // 随机生成一个飞行物 

            flyings = Arrays.copyOf(flyings, flyings.length + 1); 

            flyings[flyings.length - 1] = obj; 

        } 

    } 

    /** 走一步 */ 

    public void stepAction() { 

        for (int i = 0; i < flyings.length; i++) { // 飞行物走一步 

            FlyingObject f = flyings[i]; 

            f.step(); 

        } 

        for (int i = 0; i < bullets.length; i++) { // 子弹走一步 

            Bullet b = bullets[i]; 

            b.step(); 

        } 

        hero.step(); // 英雄机走一步 

    } 

    /** 飞行物走一步 */ 

    public void flyingStepAction() { 

        for (int i = 0; i < flyings.length; i++) { 

            FlyingObject f = flyings[i]; 

            f.step(); 

        } 

    } 

    int shootIndex = 0; // 射击计数 

    /** 射击 */ 

    public void shootAction() { 

        shootIndex++; 

        if (shootIndex % 30 == 0) { // 300毫秒发一颗 

            Bullet[] bs = hero.shoot(); // 英雄打出子弹 

            bullets = Arrays.copyOf(bullets, bullets.length + bs.length); // 扩容 

            System.arraycopy(bs, 0, bullets, bullets.length - bs.length, 

                    bs.length); // 追加数组 

        } 

    } 

    /** 子弹与飞行物碰撞检测 */ 

    public void bangAction() { 

        for (int i = 0; i < bullets.length; i++) { // 遍历所有子弹 

            Bullet b = bullets[i]; 

            bang(b); // 子弹和飞行物之间的碰撞检查 

        } 

    } 

    /** 删除越界飞行物及子弹 */ 

    public void outOfBoundsAction() { 

        int index = 0; // 索引 

        FlyingObject[] flyingLives = new FlyingObject[flyings.length]; // 活着的飞行物 

        for (int i = 0; i < flyings.length; i++) { 

            FlyingObject f = flyings[i]; 

            if (!f.outOfBounds()) { 

                flyingLives[index++] = f; // 不越界的留着 

            } 

        } 

        flyings = Arrays.copyOf(flyingLives, index); // 将不越界的飞行物都留着 

        index = 0; // 索引重置为0 

        Bullet[] bulletLives = new Bullet[bullets.length]; 

        for (int i = 0; i < bullets.length; i++) { 

            Bullet b = bullets[i]; 

            if (!b.outOfBounds()) { 

                bulletLives[index++] = b; 

            } 

        } 

        bullets = Arrays.copyOf(bulletLives, index); // 将不越界的子弹留着 

    } 

    /** 检查游戏结束 */ 

    public void checkGameOverAction() { 

        if (isGameOver()==true) { 

            state = GAME_OVER; // 改变状态 

        } 

    } 

    /** 检查游戏是否结束 */ 

    public boolean isGameOver() { 

        for (int i = 0; i < flyings.length; i++) { 

            int index = -1; 

            FlyingObject obj = flyings[i]; 

            if (hero.hit(obj)) { // 检查英雄机与飞行物是否碰撞 

                hero.subtractLife(); // 减命 

                hero.setDoubleFire(0); // 双倍火力解除 

                index = i; // 记录碰上的飞行物索引 

            } 

            if (index != -1) { 

                FlyingObject t = flyings[index]; 

                flyings[index] = flyings[flyings.length - 1]; 

                flyings[flyings.length - 1] = t; // 碰上的与最后一个飞行物交换 

                flyings = Arrays.copyOf(flyings, flyings.length - 1); // 删除碰上的飞行物 

            } 

        } 

        return hero.getLife() <= 0; 

    } 

    /** 子弹和飞行物之间的碰撞检查 */ 

    public void bang(Bullet bullet) { 

        int index = -1; // 击中的飞行物索引 

        for (int i = 0; i < flyings.length; i++) { 

            FlyingObject obj = flyings[i]; 

            if (obj.shootBy(bullet)) { // 判断是否击中 

                index = i; // 记录被击中的飞行物的索引 

                break; 

            } 

        } 

        if (index != -1) { // 有击中的飞行物 

            FlyingObject one = flyings[index]; // 记录被击中的飞行物 

            FlyingObject temp = flyings[index]; // 被击中的飞行物与最后一个飞行物交换 

            flyings[index] = flyings[flyings.length - 1]; 

            flyings[flyings.length - 1] = temp; 

            flyings = Arrays.copyOf(flyings, flyings.length - 1); // 删除最后一个飞行物(即被击中的) 

            // 检查one的类型(敌人加分，奖励获取) 

            if (one instanceof Enemy) { // 检查类型，是敌人，则加分 

                Enemy e = (Enemy) one; // 强制类型转换 

                score += e.getScore(); // 加分 

            } else { // 若为奖励，设置奖励 

                Award a = (Award) one; 

                int type = a.getType(); // 获取奖励类型 

                switch (type) { 

                case Award.DOUBLE_FIRE: 

                    hero.addDoubleFire(); // 设置双倍火力 

                    break; 

                case Award.LIFE: 

                    hero.addLife(); // 设置加命 

                    break; 

                } 

            } 

        } 

    } 

    /**

     * 随机生成飞行物

     * 

     * @return 飞行物对象

     */ 

    public static FlyingObject nextOne() { 

        Random random = new Random(); 

        int type = random.nextInt(20); // [0,20) 

        if (type < 4) { 

            return new Bee(); 

        } else { 

            return new Airplane(); 

        } 

    } 

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