Java游戏 rpg Java游戏小站

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mob64ca1409d8ea 2023-09-19 09:42:28

文章标签 Java游戏 rpg java 开发语言 ide Image 文章分类 Java 后端开发

java小游戏-java小游戏-飞机大战

1 窗口创建
2 背景图片添加
3 启动页面制作
4 启动页面点击事件
5 游戏物体父类的编写
6 背景的移动
7 双缓存的添加
8 背景图片的循环出现
9 添加我方飞机
10 添加首颗子弹
11 我方子弹的批量添加
12 敌方飞机的批量添加
13 我方子弹与敌人飞机碰撞检测
14 我方子弹与敌方飞机碰撞后处理
15 我方飞机与敌方飞机的碰撞检测
16 敌方boss的添加和移动
17 为敌方boss添加子弹
18 我方飞机与敌方的子弹碰撞检测
19 我方飞机与敌方boss的碰撞检测
20 计分面板的编写
21 游戏规则的改变
22 为boss添加生命值
23 游戏的暂停功能
24 子弹和敌机的越界消失
25 为敌机添加爆炸效果图
26 为敌方boss添加血条

1 窗口创建

创建GameWin类

public class GameWin extends JFrame {

    public void launch(){
        //设置窗口是否可见
         this.setVisible(true);
        //设置窗口大小
        this.setSize(600,600);
        //设置窗口位置
        this.setLocationRelativeTo(null);
        //设置窗口标题
        this.setTitle("飞机大战");

        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //不可修改边框
        this.setResizable(false);
    }

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

2 背景图片添加

先导入图片在项目下img文件下

创建GameUtils类

public class GameUtils {
    //背景图片
    public static Image bgImage = Toolkit.getDefaultToolkit().getImage("img/bg.jpg");
}

在GameWin类重写paint方法

@Override
public void paint(Graphics g) {
    g.drawImage(GameUtils.bgImage,0,0,null);
}

3 启动页面制作

在GameUtils类添加参数

//boss图片
public static Image bossImage = Toolkit.getDefaultToolkit().getImage("img/boss.png");
//爆炸图片
public static Image explodeImage = Toolkit.getDefaultToolkit().getImage("img/explode/e6.gif");

在GameWin类添加状态

//游戏状态 0 未开始 1 游戏中 2 暂停 3 通关失败 4 通关成功
public static int state = 0;

@Override
public void paint(Graphics g) {
    if(state == 0){
        g.drawImage(GameUtils.bgImage,0,0,null);
        g.drawImage(GameUtils.bossImage,220,120,null);
        g.drawImage(GameUtils.explodeImage,270,350,null);
        g.setColor(Color.yellow);
        g.setFont(new Font("仿宋",Font.BOLD,40));
        g.drawString("点击开始游戏",180,300);
    }
}

4 启动页面点击事件

在GameWin类launch方法添加鼠标点击事件

public void launch(){
   ...

    //鼠标点击事件
    this.addMouseListener(new MouseAdapter() {
        @Override
        public void mouseClicked(MouseEvent e) {
            if(e.getButton() == 1 && state == 0){//鼠标左键点击
                state = 1;
                repaint();
            }
        }
    });

}

@Override
public void paint(Graphics g) {
    ...
    if(state == 1){
        g.drawImage(GameUtils.bgImage,0,0,null);
        g.drawImage(GameUtils.bossImage,220,120,null);
        g.drawImage(GameUtils.explodeImage,270,350,null);
        g.setColor(Color.yellow);
        g.setFont(new Font("仿宋",Font.BOLD,40));
        g.drawString("游戏开始了",180,300);
    }
}

5 游戏物体父类的编写

创建GameObj类

public class GameObj {
    Image img;
    //坐标
    int x,y;
    //宽高
    int wight,height;

    //移动速度
    double speed;
    //窗口
    GameWin frame;

    public GameObj() { }

    public GameObj(Image img, int x, int y, double speed) {
        this.img = img;
        this.x = x;
        this.y = y;
        this.speed = speed;
    }

    public GameObj(Image img, int x, int y, int wight, int height, double speed, GameWin frame) {
        this.img = img;
        this.x = x;
        this.y = y;
        this.wight = wight;
        this.height = height;
        this.speed = speed;
        this.frame = frame;
    }

    //绘制自身方法
    public void paintSelf(Graphics g){
        g.drawImage(img,x,y,null);
    }

    //获取矩形对象，用于碰撞检测
    public Rectangle getRec(){
        return new Rectangle(x,y,wight,height);
    }

    public Image getImg() { return img; }
    public void setImg(Image img) { this.img = img; }
    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 int getWight() { return wight; }
    public void setWight(int wight) { this.wight = wight; }
    public int getHeight() { return height; }
    public void setHeight(int height) { this.height = height; }
    public double getSpeed() { return speed; }
    public void setSpeed(double speed) { this.speed = speed; }
    public GameWin getGameWin() { return frame; }
    public void setGameWin(GameWin frame) { this.frame = frame; }
}

6 背景的移动

创建BgObj类

public class BgObj extends GameObj{
	@Override
    public Image getImg() {
        return super.getImg();
    }

    public BgObj(){}

    public BgObj(Image img, int x, int y, double speed) {
        super(img, x, y, speed);
    }

    @Override
    public void paintSelf(Graphics g) {
        super.paintSelf(g);
        y += speed;
    }
}

在GameWin类中引用

//背景图片
BgObj bgObj = new BgObj(GameUtils.bgImage,0,-2000,2);

public void launch(){
    ...

    while (true){
        repaint();
        try {
            Thread.sleep(25);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

@Override
public void paint(Graphics g) {
    ...
    if(state == 1){
       bgObj.paintSelf(g);
    }
}

7 双缓存的添加

在GameWin类添加参数

Image offScreenImage = null;
//宽高
int width = 600;
int height = 600;

public void launch(){
    //设置窗口是否可见
     this.setVisible(true);
    //设置窗口大小
   ...
}

@Override
public void paint(Graphics g) {
    if(offScreenImage == null){
        offScreenImage = createImage(width,height);
    }
    Graphics gImage = offScreenImage.getGraphics();
    gImage.fillRect(0,0,width,height);
    if(state == 0){
        gImage.drawImage(GameUtils.bgImage,220,120,null);
        gImage.drawImage(GameUtils.bossImage,220,120,null);
        gImage.drawImage(GameUtils.explodeImage,270,350,null);
        gImage.setColor(Color.yellow);
        gImage.setFont(new Font("仿宋",Font.BOLD,40));
        gImage.drawString("点击开始游戏",180,300);
    }
    if(state == 1){
       bgObj.paintSelf(gImage);
    }
    g.drawImage(offScreenImage,0,0,width,height,null);
}

8 背景图片的循环出现

在BgObj类修改paintSelf方法

@Override
public void paintSelf(Graphics g) {
    super.paintSelf(g);
    y += speed;
    if(y >= 0){
        y = -2000;
    }
}

9 添加我方飞机

在GameUtils类添加常量

//我方战斗机图片
public static Image planeImg = Toolkit.getDefaultToolkit().getImage("img/plane.png");

创建PlaneObj类

public class PlaneObj extends GameObj {
    @Override
    public Image getImg() {
        return super.getImg();
    }

    public PlaneObj() {
        super();
    }

    public PlaneObj(Image img, int x, int y, int width, int height, double speed, GameWin frame) {
        super(img, x, y, width, height, speed, frame);
        this.frame.addMouseMotionListener(new MouseAdapter() {
            @Override
            public void mouseMoved(MouseEvent e) {
                PlaneObj.super.x = e.getX() - 11;
                PlaneObj.super.y = e.getY() - 16;
            }
        });
    }

    @Override
    public void paintSelf(Graphics gImage) {
        super.paintSelf(gImage);
    }

    @Override
    public Rectangle getRec() {
        return super.getRec();
    }
}

在GameWin中引用

//我方飞机对象
public PlaneObj planeObj = new PlaneObj(GameUtils.planeImg,290,550,20,30,0,this);

@Override
public void paint(Graphics g) {
    ...
    if(state == 1){
        //游戏中
       bgObj.paintSelf(gImage);
       planeObj.paintSelf(gImage);
    }
    g.drawImage(offScreenImage,0,0,width,height,null);
}

10 添加首颗子弹

在GameUtils类添加常量

//我方子弹图片
public static Image shellImg = Toolkit.getDefaultToolkit().getImage("img/shell.png");

创建ShellObj类

public class ShellObj extends GameObj{
    @Override
    public Image getImg() {
        return super.getImg();
    }

    public ShellObj() {
        super();
    }

    public ShellObj(Image img, int x, int y, int wight, int height, double speed, GameWin gameWin) {
        super(img, x, y, wight, height, speed, gameWin);
    }

    @Override
    public void paintSelf(Graphics g) {
        super.paintSelf(g);
        y -= speed;
    }

    @Override
    public Rectangle getRec() {
        return super.getRec();
    }
}

在GameWin类中引用

//我方子弹
ShellObj shellObj = new ShellObj(GameUtils.shellImg,planeObj.getX()+3,planeObj.getY()-16,14,29,5,this);

@Override
public void paint(Graphics g) {
   ...
    if(state == 1){
        //游戏中
       bgObj.paintSelf(gImage);
       planeObj.paintSelf(gImage);
       shellObj.paintSelf(gImage);
    }
    g.drawImage(offScreenImage,0,0,width,height,null);
}

11 我方子弹的批量添加

在GameUtils类添加参数

//所有游戏物体的集合
public static List<GameObj> gameObjList = new ArrayList<>();
//我方子弹的集合
public static List<ShellObj> shellObjList = new ArrayList<>();

在GameWin类中生成子弹

//    //我方子弹
//    ShellObj shellObj = new ShellObj(GameUtils.shellImg,planeObj.getX()+3,planeObj.getY()-16,14,29,5,this);
//游戏的重绘次数
int count = 1;

public void launch() {
    ...
	//设置窗口标题
    this.setTitle("飞机大战");

     GameUtils.gameObjList.add(bgObj);
     GameUtils.gameObjList.add(planeObj);

    while (true) {
        if (state == 1) {
            createObj();
            repaint();
        }
        try {
            Thread.sleep(25);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

@Override
public void paint(Graphics g) {
    ...
    if (state == 1) {
        //游戏中
        for (int i = 0; i < GameUtils.gameObjList.size(); i++) {
            GameUtils.gameObjList.get(i).paintSelf(gImage);
        }
    }
    g.drawImage(offScreenImage, 0, 0, width, height, null);
    count++;
}

//创建对象
void createObj() {
    //我方子弹
    if (count%15 == 0) {
        GameUtils.shellObjList.add(new ShellObj(GameUtils.shellImg, planeObj.getX() + 3, planeObj.getY() - 16, 14, 29, 5, this));
        GameUtils.gameObjList.add(GameUtils.shellObjList.get(GameUtils.shellObjList.size()-1));
    }
}

12 敌方飞机的批量添加

在GameUtils类添加参数

//敌机图片
public static Image enemyImg = Toolkit.getDefaultToolkit().getImage("img/enemy.png");
//敌机的集合
public static List<EnemyObj> enemyObjList = new ArrayList<>();

创建EnemyObj类

public class EnemyObj extends GameObj {

    public EnemyObj() {
        super();
    }

    public EnemyObj(Image img, int x, int y, int width, int height, double speed, GameWin frame) {
        super(img, x, y, width, height, speed, frame);
    }

    @Override
    public void paintSelf(Graphics gImage) {
        super.paintSelf(gImage);
        y += speed;
    }

    @Override
    public Rectangle getRec() {
        return super.getRec();
    }
}

在GameWin类中创建

//创建对象
void createObj() {
    //我方子弹
    if (count%15 == 0) {
        GameUtils.shellObjList.add(new ShellObj(GameUtils.shellImg, planeObj.getX() + 3, planeObj.getY() - 16, 14, 29, 5, this));
        GameUtils.gameObjList.add(GameUtils.shellObjList.get(GameUtils.shellObjList.size()-1));
    }
    //敌机创建
    if (count%15 == 0) {
        GameUtils.enemyObjList.add(new EnemyObj(GameUtils.enemyImg, (int)(Math.random()*12)*50,0,49,36,5,this));
        GameUtils.gameObjList.add(GameUtils.enemyObjList.get(GameUtils.enemyObjList.size()-1));
    }
}

13 我方子弹与敌人飞机碰撞检测

在EnemyObj类paintSelf方法添加判断

@Override
public void paintSelf(Graphics gImage) {
    super.paintSelf(gImage);
    y += speed;
    //碰撞检测
    for (ShellObj shellObj : GameUtils.shellObjList) {
        if(this.getRec().intersects(shellObj.getRec())){
            System.out.println("碰撞了");
        }
    }
}

14 我方子弹与敌方飞机碰撞后处理

在GameUtils类添加参数

//要删除元素的集合
public static List<GameObj> removeList = new ArrayList<>();

在EnemyObj类修改paintSelf方法

@Override
public void paintSelf(Graphics gImage) {
    super.paintSelf(gImage);
    y += speed;
    //碰撞检测
    for (ShellObj shellObj : GameUtils.shellObjList) {
        if(this.getRec().intersects(shellObj.getRec())){
            shellObj.setX(-100);
            shellObj.setY(-100);
            this.x = -200;
            this.y = -200;
            GameUtils.removeList.add(shellObj);
            GameUtils.removeList.add(this);
        }
    }
}

在GameWin类修改paint方法

@Override
public void paint(Graphics g) {
    ...
    if (state == 1) {
        //游戏中
        for (int i = 0; i < GameUtils.gameObjList.size(); i++) {
            GameUtils.gameObjList.get(i).paintSelf(gImage);
        }
        GameUtils.gameObjList.removeAll(GameUtils.removeList);
    }
    g.drawImage(offScreenImage, 0, 0, width, height, null);
    count++;
}

15 我方飞机与敌方飞机的碰撞检测

在EnemyObj类修改paintSelf方法

@Override
public void paintSelf(Graphics gImage) {
    super.paintSelf(gImage);
    y += speed;
    //敌我飞机碰撞检测
    if(this.getRec().intersects(this.frame.planeObj.getRec())){
        GameWin.state = 3;
    }

    ...
}

在GameWin类修改paint方法

@Override
public void paint(Graphics g) {
    ...
    if (state == 3) {
        //失败
        gImage.drawImage(GameUtils.explodeImage, planeObj.getX()-33,planeObj.getY()-50, null);
        gImage.setColor(Color.red);
        gImage.setFont(new Font("仿宋", Font.BOLD, 50));
        gImage.drawString("GAME OVER", 180, 300);
    }
    g.drawImage(offScreenImage, 0, 0, width, height, null);
    count++;
}

16 敌方boss的添加和移动

创建BossObj类

public class BossObj extends GameObj {

    public BossObj(Image img, int x, int y, int width, int height, double speed, GameWin frame) {
        super(img, x, y, width, height, speed, frame);
    }

    @Override
    public void paintSelf(Graphics gImage) {
        super.paintSelf(gImage);
        if (x > 550 || x < -50) {
            speed = -speed;
        }
        x += speed;

    }

    @Override
    public Rectangle getRec() {
        return super.getRec();
    }
}

在GameWin类中引用

//敌方boss对象
public BossObj bossObj = new BossObj(GameUtils.bossImage,250,35,155,100,5,this);

public void launch() {
    ...
    this.setTitle("飞机大战");

    GameUtils.gameObjList.add(bgObj);
    GameUtils.gameObjList.add(planeObj);
    GameUtils.gameObjList.add(bossObj);

    ...

}

17 为敌方boss添加子弹

创建BulletObj类

public class BulletObj extends GameObj {
    public BulletObj(Image img, int x, int y, int width, int height, double speed, GameWin frame) {
        super(img, x, y, width, height, speed, frame);
    }

    @Override
    public void paintSelf(Graphics gImage) {
        super.paintSelf(gImage);
        y += speed;
    }

    @Override
    public Rectangle getRec() {
        return super.getRec();
    }
}

在GameUtils类中添加参数

//敌机子弹图片
public static Image bulletImg = Toolkit.getDefaultToolkit().getImage("img/bullet.png");

//敌机子弹的集合
public static List<BulletObj> bulletObjList = new ArrayList<>();

在GameWin生成子弹

//创建对象
void createObj() {
   ...
    //敌机子弹
    if (count%15 == 0) {
        GameUtils.bulletObjList.add(new BulletObj(GameUtils.bulletImg, bossObj.getX() + 76, bossObj.getY() + 85, 15, 25, 5, this));
        GameUtils.gameObjList.add(GameUtils.bulletObjList.get(GameUtils.bulletObjList.size()-1));
    }
}

18 我方飞机与敌方的子弹碰撞检测

在BulletObj类paintSelf方法添加判断

@Override
public void paintSelf(Graphics gImage) {
    super.paintSelf(gImage);
    y += speed;
    //敌方子弹与我方飞机的碰撞检测
    if (this.getRec().intersects(this.frame.planeObj.getRec())){
        GameWin.state = 3;
    }
}

19 我方飞机与敌方boss的碰撞检测

在PlaneObj类paintSelf方法添加判断

@Override
public void paintSelf(Graphics gImage) {
    super.paintSelf(gImage);
    //我方飞机与敌方boss的碰撞检测
    if (this.frame.bossObj != null && this.getRec().intersects(this.frame.bossObj.getRec())){
        GameWin.state = 3;
    }
}

20 计分面板的编写

在GameUtils类添加方法

//绘制字符串的工具类
public static void drawWord(Graphics gImage,String str,Color color,int size,int x,int y){
    gImage.setColor(color);
    gImage.setFont(new Font("仿宋",Font.BOLD,size));
    gImage.drawString(str,x,y);
}

在GameWin类添加参数

//游戏得分
    public static int score = 0;
   
@Override
public void paint(Graphics g) {
   。。。
    if (state == 0) {
        //未开始
        gImage.drawImage(GameUtils.bgImage, 220, 120, null);
        gImage.drawImage(GameUtils.bossImage, 220, 120, null);
        gImage.drawImage(GameUtils.explodeImage, 270, 350, null);
        gImage.setColor(Color.yellow);
        GameUtils.drawWord(gImage,"点击开始游戏",Color.yellow,40,180,300);
    }
    if (state == 1) {
        //游戏中
        for (int i = 0; i < GameUtils.gameObjList.size(); i++) {
            GameUtils.gameObjList.get(i).paintSelf(gImage);
        }
        GameUtils.gameObjList.removeAll(GameUtils.removeList);
    }
    if (state == 3) {
        //失败
        gImage.drawImage(GameUtils.explodeImage, planeObj.getX()-33,planeObj.getY()-50, null);
        GameUtils.drawWord(gImage,"GAME OVER",Color.RED,50,180,300);
    }
    GameUtils.drawWord(gImage,score+" 分",Color.green,40,30,100);
    g.drawImage(offScreenImage, 0, 0, width, height, null);
    count++;
}

在EnemyObj类paintSelf方法自增

@Override
public void paintSelf(Graphics gImage) {
   ...
    //碰撞检测
    for (ShellObj shellObj : GameUtils.shellObjList) {
        if(this.getRec().intersects(shellObj.getRec())){
            shellObj.setX(-100);
            shellObj.setY(-100);
            this.x = -200;
            this.y = -200;
            GameUtils.removeList.add(shellObj);
            GameUtils.removeList.add(this);
            GameWin.score++;
        }
    }
}

21 游戏规则的改变

在GameWin类添加参数

//敌方boss对象
public BossObj bossObj = null;

//敌机出现的数量
int enemyCount = 0;

public void launch() {
   ...

    GameUtils.gameObjList.add(bgObj);
    GameUtils.gameObjList.add(planeObj);
    //GameUtils.gameObjList.add(bossObj);

    ...

}


//创建对象
void createObj() {
   //敌机子弹
   if (count%15 == 0 && bossObj != null) {
        GameUtils.bulletObjList.add(new BulletObj(GameUtils.bulletImg, bossObj.getX() + 76, bossObj.getY() + 85, 15, 25, 5, this));
        GameUtils.gameObjList.add(GameUtils.bulletObjList.get(GameUtils.bulletObjList.size()-1));
    }
    //敌机创建
    if (count%15 == 0) {
        GameUtils.enemyObjList.add(new EnemyObj(GameUtils.enemyImg, (int)(Math.random()*12)*50,0,49,36,5,this));
        GameUtils.gameObjList.add(GameUtils.enemyObjList.get(GameUtils.enemyObjList.size()-1));
        enemyCount++;
    }
   ...
    if(enemyCount > 100 && bossObj == null){
        bossObj = new BossObj(GameUtils.bossImage,250,35,155,100,5,this);
        GameUtils.gameObjList.add(bossObj);
    }
}

22 为boss添加生命值

在BossObj类添加参数判断

//boos生命值
int life = 10;

@Override
public void paintSelf(Graphics gImage) {
    super.paintSelf(gImage);
    if (x > 550 || x < -50) {
        speed = -speed;
    }
    x += speed;
    for (ShellObj shellObj : GameUtils.shellObjList){
        if (this.getRec().intersects(shellObj.getRec())){
            shellObj.setX(-100);
            shellObj.setY(100);
            GameUtils.removeList.add(shellObj);
            life--;
        }
        if (life <= 0){
            GameWin.state = 4;
        }
    }
}

在GameWin类添加游戏通关绘制

@Override
public void paint(Graphics g) {
    ...
    if (state == 4) {
        //通关
        gImage.drawImage(GameUtils.explodeImage, bossObj.getX() + 30,bossObj.getY(), null);
        GameUtils.drawWord(gImage,"游戏通关",Color.green,50,190,300);
    }
    GameUtils.drawWord(gImage,score+" 分",Color.green,40,30,100);
    g.drawImage(offScreenImage, 0, 0, width, height, null);
    count++;
}

23 游戏的暂停功能

在GameWin类中launch方法添加键盘监听事件

public void launch() {
   ...
    //键盘监听事件
    this.addKeyListener(new KeyAdapter() {
        @Override
        public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_SPACE) {
                switch (state){
                    case 1:
                        state = 2;
                        break;
                    case 2:
                        state = 1;
                        break;
                    default:
                }
            }
        }
    });
	...
}

24 子弹和敌机的越界消失

在ShellObj添加判断

@Override
public void paintSelf(Graphics g) {
    super.paintSelf(g);
    y -= speed;
    //我方子弹的越界消失 条件 y < 0  改变后的坐标 (-100,100)
    if (y < 0){
        this.x = -100;
        this.y = 100;
        GameUtils.removeList.add(this);
    }
}

在EnemyObj添加判断

@Override
public void paintSelf(Graphics gImage) {
   ...
    //敌机的越界消失 判断条件 y > 600  改变后的坐标(-200,-200)
    if (y > 600){
        this.x = -200;
        this.y = 200;
        GameUtils.removeList.add(this);
    }

   ...
}

在BulletObj添加判断

@Override
public void paintSelf(Graphics gImage) {
    ...
    //敌方子弹的越界消失 条件 y > 600  改变后的坐标(-300,300)
    if (y > 600){
        this.x = -300;
        this.y = 300;
        GameUtils.removeList.add(this);
    }
}

在GameWin类添加测试控制台输出

@Override
public void paint(Graphics g) {
    ...
    count++;
    System.out.println(GameUtils.gameObjList.size());
}

25 为敌机添加爆炸效果图

在GameObj类添加构造器

public GameObj(int x, int y) {
    this.x = x;
    this.y = y;
}

创建ExplodeObj类

public class ExplodeObj extends GameObj {

    static Image[] pic = new Image[16];

    int explodeCount = 0;

    static {
        for (int i = 0; i < pic.length; i++) {
            pic[i] = Toolkit.getDefaultToolkit().getImage("img/explode/e"+(i+1)+".gif");
        }
    }

    public ExplodeObj(int x, int y) {
        super(x, y);
    }

    @Override
    public void paintSelf(Graphics gImage) {
        if (explodeCount < 16){
            super.img = pic[explodeCount];
            super.paintSelf(gImage);
            explodeCount++;
        }
    }
}

在GameUtils添加参数

//爆炸的集合
public static List<ExplodeObj> explodeObjList = new ArrayList<>();

在EnemyObj类添加判断

@Override
public void paintSelf(Graphics gImage) {
   ...
    //碰撞检测
    for (ShellObj shellObj : GameUtils.shellObjList) {
        if(this.getRec().intersects(shellObj.getRec())){
            ExplodeObj explodeObj = new ExplodeObj(x,y);
            GameUtils.explodeObjList.add(explodeObj);
            GameUtils.removeList.add(explodeObj);
            shellObj.setX(-100);
            shellObj.setY(-100);
            this.x = -200;
            this.y = -200;
            GameUtils.removeList.add(shellObj);
            GameUtils.removeList.add(this);
            GameWin.score++;
        }
    }
}

在GameWin类添加

@Override
public void paint(Graphics g) {
    ...
    if (state == 1) {
        GameUtils.gameObjList.addAll(GameUtils.explodeObjList);
        //游戏中
        for (int i = 0; i < GameUtils.gameObjList.size(); i++) {
            GameUtils.gameObjList.get(i).paintSelf(gImage);
        }
        GameUtils.gameObjList.removeAll(GameUtils.removeList);
    }
    ...
}

26 为敌方boss添加血条

在BossObj类的paintSelf方法添加绘制

@Override
public void paintSelf(Graphics gImage) {
    ...
    //血条的白色背景
    gImage.setColor(Color.white);
    gImage.fillRect(20,40,100,10);
    //血条的绘制
    gImage.setColor(Color.red);
    gImage.fillRect(20,40,life * 100 / 10,10);
}

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