一、项目分析

创建一个窗口和画板，把画板放到窗口上，在画板上绘画图片
（2）让小鸟在画面中动起来，可以上下飞
（3）让地面和管道动起来
（4）碰撞检测
（5）绘出开始的界面和游戏结束的界面

二、项目展示

1.开始状态

2.运行状态

3.结束状态

三、实现代码

1.游戏启动类

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.IOException;/*** 游戏启动类* 使用extends 关键字 继承JPanel 画板类 ==> 于是BirdGame 就具备了画板类的功能*/
public class BirdGame extends JPanel {//    定义游戏状态public static final int START = 0;  // 开始public static final int RUNNING = 1;  // 运行public static final int GAME_OVER = 2;  // 结束// 游戏当前状态 默认0 开始状态int state = START;int score = 0; //玩家得分static BufferedImage bg = null; // 背景图片static BufferedImage start = null; //开始图片static BufferedImage ground_image = null; // 地面static BufferedImage bird_image = null; // 小鸟static BufferedImage column_image = null; // 柱子static BufferedImage gameOver_image = null; // game游戏// 静态代码块 一般用于加载静态资源(视频,音频,图片等)static {// 将本地的图片bg.png读取到程序中的bgtry {bg = ImageIO.read(BirdGame.class.getResourceAsStream("bg.png"));start = ImageIO.read(BirdGame.class.getResourceAsStream("start.png"));ground_image = ImageIO.read(BirdGame.class.getResourceAsStream("ground.png"));column_image = ImageIO.read(BirdGame.class.getResourceAsStream("column.png"));bird_image = ImageIO.read(BirdGame.class.getResourceAsStream("0.png"));gameOver_image = ImageIO.read(BirdGame.class.getResourceAsStream("gameover.png"));} catch (IOException e) {e.printStackTrace();}}Ground ground;//声明地面Bird bird;Column column1;Column column2;// BirdGame 的构造方法public BirdGame() {bird = new Bird();ground = new Ground();column1 = new Column();column2 = new Column();// 柱子2的x坐标 = 柱子1的坐标基础上+244保持水平间距column2.x = column1.x + column1.distance;}/** 用于在画板上绘制内容的方法* 想在画板上显示什么 在这个方法写就行了* @param g 画笔*  */@Overridepublic void paint(Graphics g) {// g.fillRect(0,0,100,200); // 设置颜色落笔点 宽高g.drawImage(bg, 0, 0, null); // 画背景if (state == START) {g.drawImage(start, 0, 0, null);  // 开始图片}g.drawImage(column1.image, column1.x, column1.y, null); // 画柱子g.drawImage(column2.image, column2.x, column2.y, null); // 画柱子2g.drawImage(bird.image, bird.x, bird.y, null); //小鸟图片g.drawImage(ground.image, ground.x, ground.y, null);  // 地面图片if (state == GAME_OVER) {g.drawImage(gameOver_image, 0, 0, null); // 结束图片}// 画分数Font font = new Font("微软雅黑", Font.BOLD, 25); // 创建字体g.setFont(font);  // 给画笔设置字体g.setColor(Color.BLACK);  // 设置字体黑色颜色g.drawString("分数:  " + score, 30, 50);g.setColor(Color.WHITE);  // 设置字体白色颜色g.drawString("分数:  " + score, 28, 48);}// 判断小鸟与柱子是否相撞 游戏结束public boolean isGameOver() {boolean isHit = bird.hitGround(ground) || bird.hitCeiling() || bird.hitColumn(column1) || bird.hitColumn(column2);return isHit;}// 游戏流程控制的方法public void action() throws Exception {frame.addKeyListener(new KeyAdapter() {@Overridepublic void keyPressed(KeyEvent e) {System.out.println(e.getKeyCode());if(e.getKeyCode() == 32){if (state == START) {  // 如果是开始状态 单击转换运行state = RUNNING;}if (state == RUNNING) {bird.up(); //小鸟上升}if (state == GAME_OVER) {bird = new Bird();column1 = new Column();column2 = new Column();column2.x = column1.x + column1.distance;score = 0;state = START;}}}});// 给当前对象()添加鼠标单击事件this.addMouseListener(new MouseAdapter() {@Overridepublic void mouseClicked(MouseEvent e) { // 鼠标单击执行代码if (state == START) {  // 如果是开始状态 单击转换运行state = RUNNING;}if (state == RUNNING) {bird.up(); //小鸟上升}if (state == GAME_OVER) {bird = new Bird();column1 = new Column();column2 = new Column();column2.x = column1.x + column1.distance;score = 0;state = START;}}});// 死循环 {}的代码会一直反复执行while (true) {if (state == START) {ground.step(); // 地面移动bird.fly(); // 小鸟飞翔} else if (state == RUNNING) {ground.step(); // 地面移动column1.step(); // 柱子1移动column2.step(); // 柱子2移动bird.fly(); // 小鸟飞翔bird.down(); // 小鸟下落if (isGameOver() == true) {state = GAME_OVER;}// 设置增加分数if (bird.x == column1.x + column1.width + 1 || bird.x == column2.x + column2.width + 1) {score += 5;}}repaint(); //重画 即重新执行paint 方法Thread.sleep(10); //每隔10毫秒,让程序休眠一次}}static  JFrame frame = new JFrame();// main方法 - 程序的入口(即:有main方法 程序才能运行)public static void main(String[] args) throws Exception {BirdGame game = new BirdGame(); // 创建画板对象frame.setSize(432, 644);//设置宽高frame.setLocationRelativeTo(null); // 居中显示frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 设置关闭窗口,同时使程序结束frame.setVisible(true); //设置可见性frame.add(game); // 将画板放到画框上frame.setTitle("飞翔的小鸟");// 设置标题frame.setResizable(false);// 设置不允许玩家拖动界面// 调用actiongame.action();}}

2.地面类

import java.awt.image.BufferedImage;/*
* 地面类
* */
public class Ground {int x ;// 地面坐标int y ;int width ; // 地面的宽高int height;BufferedImage image; // 地面图片public Ground(){image = BirdGame.ground_image;x = 0;y = BirdGame.bg.getHeight() - image.getHeight();width = image.getWidth();height = image.getHeight();}/** 地面走一步的方法* */public void step(){x--;if(x <= 432 - width){x=0;}}
}

3.小鸟类

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;/** 小鸟类* */
public class Bird {int x;// 坐标int y;int width; // 宽高int height;BufferedImage image; // 图片BufferedImage[] images; // 小鸟所有图片public Bird() {// 初始化数组 保存八张图片images = new BufferedImage[8];// 使用循环结构 将小鸟所有图片 存入数组for (int i = 0; i < images.length; i++) {try {images[i] = ImageIO.read(Bird.class.getResourceAsStream(i + ".png"));} catch (IOException e) {e.printStackTrace();}}image = BirdGame.bird_image;width = image.getWidth();height = image.getHeight();x = 120;y = 240;}// 小鸟飞翔的方法int index = 0;public void fly() {image = images[index % images.length];index++;}// h = v * t + g * t * t / 2int g = 6; //重力加速度double t = 0.15; // 下落时间double v = 0; // 初速度double h = 0; // 下落距离//小鸟下落一次public void down() {h = v * t + g * t * t / 2; // 具体下落的距离v = v + g * t; // 末速度 = 当前速度 + 重力加速度 * 时间y += (int) h;}// 小鸟向上飞public void up() {// 给一个 负方向的初速度v = -30;}/** 小鸟撞地面* */public boolean hitGround(Ground ground) {boolean isHit = this.y + this.height >= ground.y;return isHit;}// 小鸟撞天花板public boolean hitCeiling() {boolean isHit = this.y <= 0;return isHit;}// 小鸟撞柱子public boolean hitColumn(Column c) {boolean b1 = this.x + this.width >= c.x;boolean b2 = this.x <= c.x + c.width;boolean b3 = this.y <= c.y + c.height / 2 - c.gap / 2;boolean b4 = this.y + this.height >= c.y + c.height / 2 + c.gap / 2;// 满足b1 b2表示水平方向 相撞 b1 b2 b3 同时满足 撞上柱子 b1 b2 b4 同时满足撞下柱子return b1 && b2 && (b3 || b4);}}

4.柱子类

import java.awt.image.BufferedImage;/** 柱子类* */
public class Column {int x;// 坐标int y;int width; // 宽高int height;BufferedImage image; // 图片int gap; //上下柱子之间的间隙int distance; //水平方向柱子之间的距离int min = -(1200 / 2 - 144 / 2);int max = 644 - 146 - 144 / 2 - 1200 / 2;public Column() {gap = 144;distance = 244;image = BirdGame.column_image;width = image.getWidth();height = image.getHeight();x = BirdGame.bg.getWidth();y = (int) (Math.random() * (max - min) + min);}public void step() {x--;if (x <= -width) {x = BirdGame.bg.getWidth();y = (int) (Math.random() * (max - min) + min);}}
}