Java小项目之飞翔的小鸟

阳光穿透心脏的1/2处 2024-02-21 09:42 57阅读 0赞

视频 教程：[00\_【尚学堂】飞翔的小鸟\_游戏介绍\_哔哩哔哩\_bilibili][00_bilibili]

源码：[百度网盘 请输入提取码][Link 1]

> 涉及的知识点：
> 
>  *  JavaSE的变量、数据类型、判断语句、循环结构、数组、集合、简单窗口创建、图形图片绘制、双缓存技术、事件-键盘事件、物体的碰撞检测、File。。。
>  *

## 一、窗口的绘制 ##

### Constant ###

package com.study.util;
    
    public class Constant {
        //窗口大小
        public static final int FRAM_WIDTH=600;
        public static final int FRAM_HEIGHT=500;
    
        //窗口标题
        public static final String FRAM_TITLE="飞翔的小鸟";
    
        //窗口初始化位置
        public static final int FRAM_X=200;
        public static final int FRAM_Y=200;
    
    }

### GameApp ###

package com.study.app;
    
    import com.study.main.GameFrame;
    
    public class GameApp {
        public static void main(String[] args) {//游戏的入口
            new GameFrame();
        }
    }

### GameFrame ###

package com.study.main;
    
    import javax.swing.*;
    
    import java.awt.event.WindowAdapter;
    import java.awt.event.WindowEvent;
    
    import static com.study.util.Constant.*;
    
    /**
     * 绘制游戏的主窗口
     */
    public class GameFrame extends Frame {//继续Frame后,该类就有了创建窗口的功能
    
        public GameFrame(){
            setVisible(true);//窗口是否可见
            setSize(FRAM_WIDTH,FRAM_HEIGHT);//窗口大小
            setTitle(FRAM_TITLE);//标题
            setLocation(FRAM_X,FRAM_Y);//窗口的位置
            setResizable(false);//窗口大小不可改变
            addWindowListener(new WindowAdapter() {//窗口关闭事件
                @Override
                public void windowClosing(WindowEvent e) {
                    System.exit(0);//结束程序
                }
            });
        }
    }

运行结果：

![46c6ad8c13c744cb8be188a9c4c0c955.png][]

## 二、添加游戏背景 ##

### Constant ###

package com.study.util;
    
    import java.awt.*;
    
    public class Constant {
        //图片路径
        public static final String BK_IMG_PATH="imgs/bird_bk.png";
    
    }

### GameBackGround ###

package com.study.main;
    
    import com.study.util.Constant;
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    import static com.study.util.Constant.*;
    
    /**
     * 游戏背景类
     */
    public class GameBackGround {
    
        //背景需要的图片素材
        private BufferedImage bkimg;
    
        //构造器初始化资源
        public GameBackGround(){
            bkimg= GameUtil.loadBufferedImage(Constant.BK_IMG_PATH);
        }
    
        //绘制图片
        public void draw(Graphics g){
            int height=bkimg.getHeight();//图片高度
            int width=bkimg.getWidth();//图片宽度
            int count=Constant.FRAM_WIDTH/width+1;//循环次数
            for(int i=0;i<count;i++){
                g.drawImage(bkimg,width*i,Constant.FRAM_HEIGHT-height,null);//把图片画入窗口
            }
        }
    }

### GameFrame ###

package com.study.main;
    
    import javax.swing.*;
    
    import java.awt.*;
    import java.awt.event.WindowAdapter;
    import java.awt.event.WindowEvent;
    
    import static com.study.util.Constant.*;
    
    /**
     * 绘制游戏的主窗口
     */
    public class GameFrame extends Frame {
    
        private GameBackGround gameBackGround;//实例化gamebackGround类
    
        public GameFrame(){
            initGamg();
            new run().start();//启动线程
        }
    
        public void initGamg(){
            gameBackGround=new GameBackGround();
        }
    
        class run extends Thread{
            @Override
            public void run() {
                repaint();
                try {
                    Thread.sleep(33);//每33毫秒刷新一次
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    
        public void update(Graphics g){
            gameBackGround.draw(g);
        }
    }

### GameUtil ###

package com.study.util;
    
    import javax.imageio.ImageIO;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    
    /**
     * 工具类
     */
    public class GameUtil {
    
        //装载图片
        public static BufferedImage loadBufferedImage(String imgPath){
    
            try {
                return ImageIO.read(new FileInputStream(imgPath));
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }
    }

运行结果：

![4106fbbe6a984e98aaf70b1f1b1fde55.png][]

## 三、添加背景颜色 ##

### Constant ###

package com.study.util;
    
    import java.awt.*;
    
    public class Constant {
        //游戏背景颜色
        public static final Color BK_COLOR=new Color(0x4B4CF);
    }

### GameBackGround ###

package com.study.main;
    
    import com.study.util.Constant;
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    import static com.study.util.Constant.*;
    
    /**
     * 游戏背景类
     */
    public class GameBackGround {
        //绘制图片
        public void draw(Graphics g){
            //填充背景色
            g.setColor(BK_COLOR);
            g.fillRect(0,0,FRAM_WIDTH,FRAM_HEIGHT);
            g.setColor(Color.black);
        }
    }

运行结果：

![0e03108c7dab49899b916cbd22924121.png][]

## 四、绘制小鸟 ##

### Bird ###

package com.study.main;
    
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    import static com.study.util.Constant.BIRD_IMG;
    
    /**
     * 小鸟类
     */
    public class Bird {
        private BufferedImage[] images;//存放小鸟图片
        public static final int BIRD_IMG_COUNT=3;//小鸟图片数量
        //鸟的状态
        private int state;
        public static final int STATE_NORMAL=0;//平着飞
        public static final int STATE_UP=1;//向下飞
        public static final int STATE_DOWN=2;//向下飞
    
        //在构造方法中对资源初始化
        public Bird(){
            images=new BufferedImage[BIRD_IMG_COUNT];
            for(int i=0;i<BIRD_IMG_COUNT;i++){
                images[i]= GameUtil.loadBufferedImage(BIRD_IMG[i]);
            }
        }
    
        //绘制小鸟
        public void draw(Graphics g){
            g.drawImage(images[state],200,200,null);
        }
    }

### Constant ###

package com.study.util;
    
    import java.awt.*;
    
    public class Constant {
        //小鸟的图片
        public static final String[] BIRD_IMG=
                {"imgs/bird_normal.png","imgs/bird_up.png","imgs/bird_down.png"};//上下摆翅膀
    }

### GameFrame ###

运行结果：

![e7e0a0dc08974e41b22cbecf89913913.png][]

## 五、实现小鸟的移动 ##

### Bird ###

package com.study.main;
    
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    import static com.study.util.Constant.BIRD_IMG;
    
    /**
     * 小鸟类
     */
    public class Bird {
        //小鸟的位置
        private int x=200,y=200;
        //小鸟的移动方向
        private boolean up=false,down=false;
        //小鸟的移动速度
        private int speed=4;
    
        //绘制小鸟
        public void draw(Graphics g){
            flyLogic();
        }
    
        //控制小鸟移动方向
        public void flyLogic(){
            if(up){
                y-=speed;//向上飞
                if(y<30){//控制小鸟不飞出窗口的上边界
                    y=30;
                }
            }
            if(!up){
                y+=speed;//自由落体
                if(y>475){//控制小鸟不飞出窗口的下边界
                    y=475;
                }
            }
        }
        public void fly(int fly){
            switch (fly){
                case 1:
                    state=1;
                    up=true;
                    break;
                case 5:
                    state=2;
                    up=false;
                    break;
            }
        }
    }

### GameFrame ###

package com.study.main;
    
    import javax.swing.*;
    
    import java.awt.*;
    import java.awt.event.KeyAdapter;
    import java.awt.event.KeyEvent;
    import java.awt.event.WindowAdapter;
    import java.awt.event.WindowEvent;
    
    import static com.study.util.Constant.*;
    
    /**
     * 绘制游戏的主窗口
     */
    public class GameFrame extends Frame {//继续Frame后,该类就有了创建窗口的功能
        //在构造方法中初始化一些参数
        public GameFrame(){
            //添加按键监听
            addKeyListener(new KeyAdapter() {
                @Override
                public void keyPressed(KeyEvent e) {
                    add(e);//按向上的方向键
                }
    
                @Override
                public void keyReleased(KeyEvent e) {
                    minu(e);//抬向上的方向键
                }
            });
    
        }
        class run extends Thread{
            @Override
            public void run() {
                while(true) {//时刻绘制
                    repaint();
                    try {
                        Thread.sleep(33);//每33毫秒刷新一次
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
        //按键
        public void add(KeyEvent e){
            switch (e.getKeyCode()){
                case KeyEvent.VK_UP:
                    bird.fly(1);
                    break;
            }
        }
    
        //抬键
        public void minu(KeyEvent e){
            switch (e.getKeyCode()){
                case KeyEvent.VK_UP:
                    bird.fly(5);
                    break;
            }
        }
    }

运行结果：

![1b151fb7def6425fbf870bc9f20e5d87.png][]![a6ada975d8c240ef9232fc76edf392bb.png][]

## 六、解决屏幕闪烁问题 ##

### GameFrame ###

运行结果：

![5d753292bcb24615ad9ca288564461da.png][]

## 七、云彩的添加与移动 ##

### Cloud ###

package com.study.main;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    /**
     * 云彩类
     */
    public class Cloud {
    
        private BufferedImage img;//云彩图片
        private int speed;//云彩速度
        private int x,y;//云彩的位置
    
        public Cloud(){}
    
        public Cloud(BufferedImage img, int speed, int x, int y) {
            this.img = img;
            this.speed = speed;
            this.x = x;
            this.y = y;
        }
    
        public void draw(Graphics g){
            x-=speed;
            g.drawImage(img,x,y,null);
        }
    }

### GameFrame ###

### GameFrontGround ###

package com.study.main;
    
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * 游戏的前景类
     */
    public class GameFrontGround {
        //云彩的个数
        private static final int CLOUD_COUNT=2;
        //存放云彩的容器
        private List<Cloud> clouds;
        //云彩的飞行速度
        private static final int CLOUD_SPEED=1;
        //云彩图片
        private BufferedImage[] img;
    
        //构造器初始化数据
        public GameFrontGround(){
            clouds=new ArrayList<>();
            img=new BufferedImage[CLOUD_COUNT];
    
            //容器中添加云彩的图片
            for(int i=0;i<CLOUD_COUNT;i++){
                img[i]= GameUtil.loadBufferedImage("imgs/cloud"+i+".png");
            }
        }
    
        //绘制云彩
        public void draw(Graphics g){
            Cloud cloud=new Cloud(img[1],CLOUD_SPEED,300,300);
            clouds.add(cloud);
            clouds.get(0).draw(g);
        }
    }

运行结果：

![3dda1d1080374f0696692adc99db88da.png][]

## 八、云彩的自动生成与销毁 ##

### Cloud ###

package com.study.main;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    /**
     * 云彩类
     */
    public class Cloud {
        /**
         * 用于判断云彩是否飞出屏幕以外,飞出后把云彩从容器中移除
         */
        public boolean isOutFrame(){
            if(x<-100){
                return true;
            }
            return false;
        }
    }

### GameFrontGround ###

package com.study.main;
    
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Random;
    
    /**
     * 游戏的前景类
     */
    public class GameFrontGround {
    
        //构造器初始化数据
        public GameFrontGround(){
            random=new Random();
        }
    
        //绘制云彩
        public void draw(Graphics g){
            logic();
            for(int i=0;i<clouds.size();i++){
                clouds.get(i).draw(g);
            }
        }
    
        /**
         * 用于云彩的个数控制
         */
        private void logic(){
            if((int)(500*Math.random())<5){//产生0到1的随机整数,再乘以500,即产生从0到500的随机整数
                //在窗口上方0到150的区域随机生成云
                Cloud cloud=new Cloud(img[random.nextInt(CLOUD_COUNT)],CLOUD_SPEED,600,random.nextInt(150));
                clouds.add(cloud);//把对象放入容器中
            }
            for(int i=0;i<clouds.size();i++){
                Cloud cloud = clouds.get(i);
                if(cloud.isOutFrame()){
                    clouds.remove(i);
                    i--;
                    System.out.println("云被移除了"+cloud);
                }
            }
        }
    }

运行结果：

![0472ff9d70c34fcc99072239df57ff14.png][]

## 九、绘制障碍物 ##

### Barrier ###

package com.study.main;
    
    import com.study.util.Constant;
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    /**
     * 障碍物类
     */
    public class Barrier {
    
        //障碍物移动速度
        private int speed=3;
    
        private static BufferedImage[] imgs;
    
        static{
            final int COUNT=3;
            //类加载时初始化图片
            imgs=new BufferedImage[COUNT];
            for (int i=0;i<COUNT;i++){
                imgs[i]= GameUtil.loadBufferedImage(Constant.BARRIER_IMG_PATH[i]);
            }
        }
        //位置
        private int x,y;
        //宽度和高度
        private int width,height;
        //障碍物的类型
        private int type;
        public static final int TYPE_TOP_NORMAL=0;
        public static final int TYPE_BOTTOM_NORMAL=2;
        public static final int TYPE_HOVER_NORMAL=4;
    
        //获取障碍物的宽度和高度
        public static final int BARRIER_WIDTH=imgs[0].getWidth();//悬浮在中间的障碍物
        public static final int BARRIER_HEIGHT=imgs[0].getHeight();
        public static final int BARRIRE_HEAD_WIDTH = imgs[1].getWidth();
        public static final int BARRIRE_HEAD_HEIGHT = imgs[1].getHeight();
    
        public Barrier(){}
    
        public Barrier(int x, int y,int height, int type) {
            this.x = x;
            this.y = y;
            this.height = height;
            this.type = type;
            this.width = BARRIER_WIDTH;
        }
    
        //根据不同类型绘制障碍物
        public void draw(Graphics g){
            switch (type){
                case TYPE_TOP_NORMAL:
                    drawTopNormal(g);
                    break;
                case TYPE_BOTTOM_NORMAL:
                    drawBottomNormal(g);
                    break;
            }
        }
    
        //绘制从上往下的障碍物
        private void drawTopNormal(Graphics g){
    
            //求出所需要的障碍物块数
            //窗口的高度减去头的高度,再除以中间块的高度
            int count=(height-BARRIRE_HEAD_HEIGHT )/BARRIER_HEIGHT+1;
            //绘制障碍物
            for(int i=0;i<count;i++){
                g.drawImage(imgs[0],x,y+i*BARRIER_HEIGHT,null);
            }
            //绘制头
            int y=height-BARRIER_DOWN_HEIGHT;
            g.drawImage(imgs[2],x-(BARRIRE_HEAD_WIDTH-BARRIER_WIDTH)/2,y,null);
            x-=speed;
        }
    
        //绘制从下往上的障碍物
        private void drawBottomNormal(Graphics g){
    
            //求出所需要的障碍物块数
            int count=height/BARRIRE_HEIGHT +1;
            //绘制障碍物
            for(int i=0;i<count;i++){
                g.drawImage(imgs[0],x,Constant.FRAM_HEIGHT-i*BARRIER_HEIGHT,null);
            }
            //绘制头
            int y=Constant.FRAM_HEIGHT-height;
            g.drawImage(imgs[1],x-(BARRIRE_HEAD_WIDTH-BARRIER_WIDTH)/2,y,null);
            x-=speed;
        }
    
    }

### Constant ###

package com.study.util;
    
    import java.awt.*;
    
    public class Constant {
        //障碍物的图片
        public static final String[] BARRIER_IMG_PATH={
            "imgs/barrier.png","imgs/barrier_up.png","imgs/barrier_down.png"
        };
    }

### GameBarrierLayer ###

package com.study.main;
    
    import java.awt.*;
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * 游戏中障碍物层
     */
    public class GameBarrierLayer {
    
        private List<Barrier> barriers;
    
        public GameBarrierLayer(){
            barriers=new ArrayList<>();
        }
    
        //绘制障碍物
        public void draw(Graphics g){
            Barrier barrier=new Barrier(200,0,200,0);
            barriers.add(barrier);
            barriers.get(0).draw(g);
            Barrier barrier1=new Barrier(300,0,300,2);
            barriers.add(barrier1);
            barriers.get(1).draw(g);
        }
    }

### GameFrame ###

运行结果：

![bc3c8cbc2f234e6dbed1f54b3e0c6dce.png][]

## 十、障碍物自动生成 ##

### Barrier ###

### GameBarrierLayer ###

package com.study.main;
    
    import java.awt.*;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Random;
    
    /**
     * 游戏中障碍物层
     */
    public class GameBarrierLayer {
    
        private Random random=new Random();
        //绘制障碍物
        public void draw(Graphics g){
            for(int i=0;i<barriers.size();i++){
                Barrier barrier=barriers.get(i);
                barrier.draw(g);
            }
            logic();
        }
    
        //上方障碍物高度
        private int numberTop;
        //下方障碍物高度
        private int numberDown;
        //产生两个100-500之间的随机高度
        public void run(){
            numberTop=random.nextInt(400)+100;
            numberDown=random.nextInt(400)+100;
            //如果管道重合,则重新随机
            if(numberTop+numberDown>450){
                run();
            }
        }
    
        public void logic(){
            if(barriers.size()==0){
                run();
                Barrier top=new Barrier(600, 0, numberTop, 0);
                barriers.add(top);
                Barrier down=new Barrier(600, 500-numberDown, numberDown, 2);
                barriers.add(down);
            }else{
                //判断最后一个障碍物是否完全进入屏幕内
                Barrier last = barriers.get(barriers.size() - 1);
                if(last.isInFrame()){
                    run();
                    Barrier top=new Barrier(600, 0, numberTop, 0);
                    barriers.add(top);
                    Barrier down=new Barrier(600, 500-numberDown, numberDown, 2);
                    barriers.add(down);
                }
            }
        }
    
    }

运行结果：

![6a16d74413c340daab075d919bbd3720.png][]

## 十一、障碍物对象池 ##

### Barrier ###

package com.study.main;
    
    import com.study.util.Constant;
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    /**
     * 障碍物类
     */
    public class Barrier {
    
        //障碍物的状态
        private boolean visible;
        //绘制从上往下的障碍物
        private void drawTopNormal(Graphics g){
            if(x<-50){//障碍物出框了
                visible=false;
            }
        }
    
        //绘制从下往上的障碍物
        private void drawBottomNormal(Graphics g){
            if(x<-50){//障碍物出框了
                visible=false;
            }
        }
    
        //什么时候绘制下一组障碍物
        public boolean isInFrame(){
            return 600-x>150;
        }
    
        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 getHeight() {
            return height;
        }
    
        public void setHeight(int height) {
            this.height = height;
        }
    
        public int getType() {
            return type;
        }
    
        public void setType(int type) {
            this.type = type;
        }
    
        public boolean isVisible() {
            return visible;
        }
    
        public void setVisible(boolean visible) {
            this.visible = visible;
        }
    }

### BarrierPool ###

package com.study.main;
    
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * 为了避免反复地创建和销毁对象,使用对象池来提前创建好对象
     * 反复使用
     */
    public class BarrierPool {
        //管理对象的容器
        private static List<Barrier> pool=new ArrayList<>();
    
        //池中初始的对象个数
        public static final int initCount=16;
    
        //对象池中最大个数
        public static final int maxCount=20;
    
        static{
            //初始化池中的对象
            for(int i=0;i<initCount;i++){
                pool.add(new Barrier());
            }
        }
    
        /**
         * 从池中获取一个对象
         */
        public static Barrier getPool(){
            int size=pool.size();
            if(size>0){
                //返回对象并移除
                System.out.println("拿走一个");
                return pool.remove(size-1);
            }else{
                //池中没有对象了,只能new
                System.out.println("新的对象");
                return new Barrier();
            }
        }
    
        /**
         * 将对象归还容器中
         */
        public static void setPool(Barrier barrier){
            if (pool.size() < maxCount) {
                pool.add(barrier);
                System.out.println("归还对象");
            }
        }
    }

### GameBarrierLayer ###

package com.study.main;
    
    import java.awt.*;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Random;
    
    /**
     * 游戏中障碍物层
     */
    public class GameBarrierLayer {
    
        //绘制障碍物
        public void draw(Graphics g){
            for(int i=0;i<barriers.size();i++){
                Barrier barrier=barriers.get(i);
                if(barrier.isVisible()){
                    barrier.draw(g);
                }else{
                    Barrier remove = barriers.remove(i);
                    BarrierPool.setPool(remove);//把障碍物对象还回对象池
                    i--;
                }
    
            }
            logic();
        }
    
    
        public void logic(){
            if(barriers.size()==0){
                run();
                insert(600, 0, numberTop, 0);
                insert(600, 500-numberDown, numberDown, 2);
            }else{
                //判断最后一个障碍物是否完全进入屏幕内
                Barrier last = barriers.get(barriers.size() - 1);
                if(last.isInFrame()){
                    run();
                    insert(600, 0, numberTop, 0);
                    insert(600, 500-numberDown, numberDown, 2);
                }
            }
        }
    
        /**
         * 用于从池中获取对象,并把参数封装成barrier,存入barriers数组中
         */
        public void insert(int x,int y,int num,int type){
            Barrier top= BarrierPool.getPool();
            top.setX(x);
            top.setY(y);
            top.setHeight(num);
            top.setType(type);
            top.setVisible(true);
            barriers.add(top);
        }
    }

运行结果：

![4009c917068742759622a861a99e8aaf.png][]

## 十二、判断小鸟与障碍物发生碰撞 ##

### Barrier ###

package com.study.main;
    
    import com.study.util.Constant;
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    /**
     * 障碍物类
     */
    public class Barrier {
    
        //矩形参数
        private Rectangle rect;
    
        public Barrier(){
            rect=new Rectangle();
        }
    
        //绘制从上往下的障碍物
        private void drawTopNormal(Graphics g){
            rect(g);
        }
    
        //绘制从下往上的障碍物
        private void drawBottomNormal(Graphics g){
            rect(g);
        }
    
        /**
         * 绘制障碍物碰撞矩形
         * @return
         */
        public void rect(Graphics g){
            int x1=this.x;
            int y1=this.y;
            int w1=imgs[0].getWidth();
            g.setColor(Color.blue);
            g.drawRect(x1,y1,w1,height);
            setRectangle(x1,y1,w1,height);
        }
    
        /**
         * 绘制障碍物碰撞矩形参数
         * @return
         */
        public void setRectangle(int x,int y,int width,int height){
            rect.x=x;
            rect.y=y;
            rect.width=width;
            rect.height=height;
        }
    
        public Rectangle getRect() {
            return rect;
        }
    }

### Bird ###

package com.study.main;
    
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    import static com.study.util.Constant.BIRD_IMG;
    
    /**
     * 小鸟类
     */
    public class Bird {
    
        //小鸟矩形对象
        private Rectangle rect;
    
        //小鸟的生命
        public boolean life=true;//默认存活
    
        //在构造方法中对资源初始化
        public Bird(){
            int w=images[0].getWidth();
            int h=images[0].getHeight();
            rect=new Rectangle(w,h);
        }
    
        //绘制小鸟
        public void draw(Graphics g){
    
            //绘制小鸟的矩形
            g.drawRect(x,y,(int)rect.getWidth(),rect.height);
            rect.x=this.x;
            rect.y=this.y;
        }
    
        public Rectangle getRect() {
            return rect;
        }
    }

### GameBarrierLayer ###

package com.study.main;
    
    import java.awt.*;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Random;
    
    /**
     * 游戏中障碍物层
     */
    public class GameBarrierLayer {
    
        //绘制障碍物
        public void draw(Graphics g,Bird bird){
            collideBird(bird);
        }
    
        /**
         * 判断障碍物和小鸟发生碰撞
         */
        public boolean collideBird(Bird bird){
            for(int i=0;i<barriers.size();i++){
                Barrier barrier=barriers.get(i);
                //判断矩形是否相交
                if(barrier.getRect().intersects(bird.getRect())){
                    System.out.println("撞上了");
                    bird.life=false;//小鸟已废
                }
            }
            return false;
        }
    }

### GameFrame ###

运行结果：

![639474def9ff421badbb23505676f32a.png][]

## 十三、计时功能 ##

### GameBarrierLayer ###

package com.study.main;
    
    import java.awt.*;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Random;
    
    /**
     * 游戏中障碍物层
     */
    public class GameBarrierLayer {
    
        private GameTime gameTime;
    
        public GameBarrierLayer(){
            gameTime=new GameTime();
        }
    
    
        public void logic(Graphics g){
            if(barriers.size()==0){
                run();
                gameTime.begin();
            }else{
                //画计时数字
                g.setColor(Color.white);
                long differ = gameTime.differ();
                g.setFont(new Font("微软雅黑",1,20));
                g.drawString("坚持了: "+differ+"秒",30,70);
            }
        }
    
    }

### GameTime ###

package com.study.main;
    
    /**
     * 游戏计时器
     */
    public class GameTime {
    
        //开始
        private long beginTime;
        //结束
        private long endTime;
        //时间差
        private long differ;
    
        public GameTime(){}
    
        public void begin(){
            beginTime=System.currentTimeMillis();
        }
        /**
         * 计算时间差
         */
        public long differ(){
            endTime=System.currentTimeMillis();
            return differ=(endTime-beginTime)/1000;
        }
    }

运行结果：

![09d9c5bb9d0b4ab59af515f322a2ccc3.png][]

## 十四、添加悬浮障碍物 ##

### Barrier ###

package com.study.main;
    
    import java.awt.*;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Random;
    
    /**
     * 游戏中障碍物层
     */
    public class GameBarrierLayer {
    
        public void logic(Graphics g){
            if(barriers.size()==0){
            }else{
                if(last.isInFrame()) {
                    run();
                    if (number < 50) {//添加中间的悬浮障碍物
                        insert(600, 32, 440, 4);
                    } else if (number > 450){//添加中间可自由移动的障碍物
                        insert(600,125,200,6);
                    }else{//分别添加固定在上头和下头的障碍物
                        insert(600, 0, numberTop, 0);
                        insert(600, 500 - numberDown, numberDown, 2);
                    }
                }
            }
        }
    
    
    }

### GameBarrierLayer ###

package com.study.main;
    
    import com.study.util.Constant;
    import com.study.util.GameUtil;
    
    import java.awt.*;
    import java.awt.image.BufferedImage;
    
    /**
     * 障碍物类
     */
    public class Barrier {
        //障碍物的状态
        private boolean mob=true;
    
        //障碍物的类型
        public static final int TYPE_HOVER_NORMAL=4;
        public static final int TYPE_MOBILE=6;
    
        //根据不同类型绘制障碍物
        public void draw(Graphics g){
            switch (type){
                case TYPE_HOVER_NORMAL:
                    drawHoverNormal(g);
                    break;
                case TYPE_MOBILE:
                    drawMobile(g);
                    break;
                default:
            }
        }
        //绘制中间悬浮的障碍物
        private void drawHoverNormal(Graphics g){
    
            //求出所需要的障碍物块数
            int count=(height-BARRIER_HEAD_HEIGHT)/BARRIER_HEIGHT;
            //绘制上头
            g.drawImage(imgs[1],x,y,null);
            //绘制障碍物
            for(int i=0;i<count;i++){
                g.drawImage(imgs[0],x,y+BARRIER_HEAD_HEIGHT+i*BARRIER_HEIGHT,null);
            }
            rect(g);
            //绘制下头
            int y11=y+height-BARRIER_HEAD_HEIGHT;
            g.drawImage(imgs[2],x,y11,null);
            x-=speed;
            if(x<-50){//障碍物出框了
                visible=false;
            }
        }
        //绘制中间可自由移动的障碍物
        private void drawMobile(Graphics g){
    
            //求出所需要的障碍物块数
            int count=(height-BARRIER_HEAD_HEIGHT)/BARRIER_HEIGHT;
            //绘制上头
            g.drawImage(imgs[1],x,y,null);
            //绘制障碍物
            for(int i=0;i<count;i++){
                g.drawImage(imgs[0],x,y+BARRIER_HEAD_HEIGHT+i*BARRIER_HEIGHT,null);
            }
            rect(g);
            //绘制下头
            int y11=y+height-BARRIER_HEAD_HEIGHT;
            g.drawImage(imgs[2],x,y11,null);
            x-=speed;
            if(x<-50){//障碍物出框了
                visible=false;
            }
            //让障碍物移动起来
            if(mob){
                y+=5;
                if(y>=250){//障碍物触到窗口下边界了
                    mob=false;
                }
            }else if(!mob){//触下界后,障碍物往上移动
                y-=5;
                if(y<=100){//触上界
                    mob=true;//往下移
                }
            }
        }
    }

运行结果：

![185ed7c75c884faf8d1d22cababb224b.png][]

## 十五、按下空格重新开始游戏 ##

### Bird ###

### GameBarrierLayer ###

### GameFrame ###

package com.study.main;
    
    import javax.swing.*;
    
    import java.awt.*;
    import java.awt.event.KeyAdapter;
    import java.awt.event.KeyEvent;
    import java.awt.event.WindowAdapter;
    import java.awt.event.WindowEvent;
    import java.awt.image.BufferedImage;
    
    import static com.study.util.Constant.*;
    
    /**
     * 绘制游戏的主窗口
     */
    public class GameFrame extends Frame {//继续Frame后,该类就有了创建窗口的功能
        //在此方法内绘制所有需要绘制的内容
        public void update(Graphics g){
            if(bird.life){
            }else{
                String reset="Space Reset Game";
                g.drawString(reset,25,350);
            }
        }
    
        //按键
        public void add(KeyEvent e){
            switch (e.getKeyCode()){
                case KeyEvent.VK_SPACE:
                    if(bird.life==false){
                        restart();
                    }
                    break;
                default:
            }
        }
    
        /**
         * 重置游戏
         */
        public void restart(){
            gameBarrierLayer.restart();//清空缓存
            bird.restartDraw();//复活小鸟
        }
    }

运行结果：

![ea4acf1e0a7a427f98799411c5d04163.png][]

## 十六、记录的持久化 ##

### GameBarrierLayer ###

package com.study.main;
    
    import java.awt.*;
    import java.io.*;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Random;
    
    /**
     * 游戏中障碍物层
     */
    public class GameBarrierLayer {
        public void logic(Graphics g){
            if(barriers.size()==0){
            }else{
                txt=getTxt();
                if(differ<=txt){
                    g.drawString("最高成绩: "+txt,200,70);
                }else{
                    setTxt(String.valueOf(differ));
                    g.drawString("最高成绩: "+getTxt(),200,70);
                }     
            }
        }
    
        File file=new File("D:\\java-idea-2023\\bird\\game.txt");
        /**
         * 得到文件中的数据
         */
        public int getTxt(){
            BufferedReader in= null;//字符流
            try {
                in = new BufferedReader(new FileReader(file));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
            int read= 0;
            try {
                read = Integer.parseInt(in.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return read;
        }
        /**
         * 储存数据
         */
        public void setTxt(String str){
            FileWriter fileWriter= null;
            try {
                fileWriter = new FileWriter(file);
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                fileWriter.write(str);
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                fileWriter.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    
    
    }

运行结果：

![b9bc2fe59707405489bcee01586f66e7.png][]

[00_bilibili]: https://www.bilibili.com/video/BV1JR4y1J7aE?p=1&vd_source=4ac53f52a57eb96a3c8406b971b038ae
[Link 1]: https://1.1s0.cn/Zia
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[4106fbbe6a984e98aaf70b1f1b1fde55.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/1ec2b895f99d406294b9b9db1c4a4439.png
[0e03108c7dab49899b916cbd22924121.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/40474a2fc332451b8274f4a7bce1d48a.png
[e7e0a0dc08974e41b22cbecf89913913.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/b4698b2c911248debb5bbfb0544e4d86.png
[1b151fb7def6425fbf870bc9f20e5d87.png]: https://img-blog.csdnimg.cn/1b151fb7def6425fbf870bc9f20e5d87.png
[a6ada975d8c240ef9232fc76edf392bb.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/9edef8842acc4e518f5688f8cdf2e188.png
[5d753292bcb24615ad9ca288564461da.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/ebfb3e08532b451a9d569020033decec.png
[3dda1d1080374f0696692adc99db88da.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/61bf5986445b462c82eceb93f5be98b2.png
[0472ff9d70c34fcc99072239df57ff14.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/25a25a567a3f4d7b84cec9d96d77cd70.png
[bc3c8cbc2f234e6dbed1f54b3e0c6dce.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/94ca236ee8ed4fc6a9a0f1bcec3cd434.png
[6a16d74413c340daab075d919bbd3720.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/07746ab3a66f4e40a1b035de92ef47b6.png
[4009c917068742759622a861a99e8aaf.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/0a09327c219f4645b7fa87e823bdb7de.png
[639474def9ff421badbb23505676f32a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/ebf8d3254c7b4032ac2c533af8d02540.png
[09d9c5bb9d0b4ab59af515f322a2ccc3.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/8e6f3326a3de4a6d92288edd1a4e6f9c.png
[185ed7c75c884faf8d1d22cababb224b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/3979b22febe84f9b9f4d0fbe4bbc5c7f.png
[ea4acf1e0a7a427f98799411c5d04163.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/eee71a642a6645d48e4139453f0efa24.png
[b9bc2fe59707405489bcee01586f66e7.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/21/2f754eacbd55461eb976100c82236988.png