1 package testfly; 2  3 import java.awt.Color; 4 import java.awt.Font; 5 import java.awt.Graphics; 6 import java.awt.Graphics2D; 7 import java.awt.event.MouseAdapter; 8 import java.awt.event.MouseEvent; 9 import java.awt.event.MouseListener; 10 import java.awt.image.BufferedImage; 11 import java.util.Random; 12  13 import javax.imageio.ImageIO; 14 import javax.swing.JFrame; 15 import javax.swing.JPanel; 16 public class TestBirdFly extends JPanel { 17  Bird bird; 18  Column column1, column2;  19  Ground ground; 20  BufferedImage background; 21 boolean gameOver; 22 boolean started; 23  BufferedImage gameoverImg; 24 //分数 25 int score; 26 /** 初始化 BirdGame 的属性变量 */ 27 public TestBirdFly() throws Exception { 28 score = 0; 29 bird = new Bird(); 30 column1 = new Column(1); 31 column2 = new Column(2); 32 ground = new Ground(); 33 gameOver=false; 34 background = ImageIO.read( 35 getClass().getResource("bg.png"));  36 gameoverImg= ImageIO.read( 37 getClass().getResource("gameover.png")); 38  } 39  40 /** "重写(修改)"paint方法实现绘制 */ 41 public void paint(Graphics g){ 42 g.drawImage(background, 0, 0, null); 43  g.drawImage(column1.image,  44 column1.x-column1.width/2,  45 column1.y-column1.height/2, null); 46  g.drawImage(column2.image,  47 column2.x-column2.width/2,  48 column2.y-column2.height/2, null); 49 //在paint方法中添加绘制分数的算法 50 Font f = new Font(Font.SANS_SERIF, 51 Font.BOLD, 40); 52  g.setFont(f); 53 g.drawString(""+score, 40, 60); 54  g.setColor(Color.WHITE); 55 g.drawString(""+score, 40-3, 60-3); 56  57  g.drawImage(ground.image, ground.x,  58 ground.y, null); 59 if (gameOver){ 60 g.drawImage(gameoverImg,0,0,null); 61 return; 62  } 63 //旋转(rotate)绘图坐标系，是API方法 64 Graphics2D g2 = (Graphics2D)g; 65 g2.rotate(-bird.alpha, bird.x, bird.y); 66  g.drawImage(bird.image,  67 bird.x-bird.width/2,  68 bird.y-bird.height/2, null); 69  g2.rotate(bird.alpha, bird.x, bird.y); 70 }//paint方法的结束 71 //BirdGame中添加方法action() 72 public void action() throws Exception { 73 MouseListener l=new MouseAdapter(){ 74 //Mouse 老鼠 Pressed按下 75 public void mousePressed(  76  MouseEvent e){ 77 //鸟向上飞扬 78 started=true; 79  bird.flappy(); 80  81  } 82  }; 83 //将l挂接到当前的面板（game）上 84  addMouseListener(l); 85  86 while(true){ 87  88  89 //计分逻辑 90 if(!gameOver||started){ 91  ground.step(); 92  column1.step(); 93  column2.step(); 94  bird.step(); 95  } 96  bird.fly(); 97  ground.step(); 98  99 if(bird.hit(ground) ||bird.hit(column1)||bird.hit(column2)){100 gameOver=true;101  }102  bird.fly();103 if (bird.x==column1.x||bird.x==column2.x){104 score++;105  }repaint();106 107 Thread.sleep(1000/60);108  }109  }110 111 /** 启动软件的方法 */112 public static void main(String[] args)113 throws Exception {114 JFrame frame = new JFrame();115 TestBirdFly game = new TestBirdFly();116  frame.add(game);117 frame.setSize(440, 670);118 frame.setLocationRelativeTo(null);119  frame.setDefaultCloseOperation(120  JFrame.EXIT_ON_CLOSE);121 frame.setVisible(true);122  game.action();123  }124 }125 /** 地面 */126 class Ground{127  BufferedImage image;128 int x, y;129 int width;130 int height;131 public Ground() throws Exception {132 image = ImageIO.read(133 getClass().getResource("ground.png"));134 width = image.getWidth();135 height = image.getHeight();136 x = 0;137 y = 500;138 }//地面的构造器结束139 //地面的类体中,添加方法，地面移动一步140 public void step(){141 x--;142 if(x==-109){143 x = 0;144  }145  }146 }//地面类的结束147 /** 柱子类型，x,y是柱子的中心点的位置 */148 class Column{149  BufferedImage image;150 int x,y;151 int width, height;152 /** 柱子中间的缝隙 */153 int gap;154 int distance;//距离，两个柱子之间的距离155 Random random = new Random();156 /** 构造器：初始化数据，n代表第几个柱子 */157 public Column(int n) throws Exception {158 image=ImageIO.read(159 getClass().getResource("column.png"));160 width = image.getWidth();161 height = image.getHeight();162 gap=144;163 distance = 245;164 x = 550+(n-1)*distance;165 y = random.nextInt(218)+132;166  }167 //在Column中添加方法 step，在action调用此方法168 public void step(){169 x--;170 if(x==-width/2){171 x = distance * 2 - width/2;172 y = random.nextInt(218)+132;173  }174  }175 }//Column类的结束176 /** 鸟类型, x,y是鸟类型中心的位置 */177 class Bird{178  BufferedImage image;179 int x,y;180 int width, height;181 int size;//鸟的大小，用于碰撞检测182 183 //在Bird类中增加属性，用于计算鸟的位置184 double g;// 重力加速度185 double t;// 两次位置的间隔时间186 double v0;// 初始上抛速度187 double speed;// 是当前的上抛速度188 double s;// 是经过时间t以后的位移189 double alpha;// 是鸟的倾角 弧度单位190 //在Bird类中定义191 //定义一组（数组）图片，是鸟的动画帧192  BufferedImage[] images;193 //是动画帧数组元素的下标位置194 int index;195 196 public Bird() throws Exception {197 image=ImageIO.read(198 getClass().getResource("0.png"));199 width = image.getWidth();200 height = image.getHeight();201 x = 132;202 y = 280;203 size = 10;204 g = 1;205 v0 = 10;206 t = 0.25;207 speed = v0;208 s = 0;209 alpha=0;210 //创建数组,创建8个元素的数组211 //是8个空位置，没有图片对象，212 //8个位置的序号: 0 1 2 3 4 5 6 7213 images = new BufferedImage[8];214 for(int i=0; i<8; i++){215 //i = 0 1 2 3 4 5 6 7 216 images[i] = ImageIO.read(217 getClass().getResource(i+".png"));218  }219 index = 0;220  }221 //在Bird中添加飞翔(fly)的代码222 public void fly(){223 index++;224 image = images[(index/12) % 8];225  }226 //在Bird中添加鸟的移动方法227 public void step(){228 double v0 = speed;229 s = v0*t + g*t*t/2;//计算上抛运动位移230 y = y-(int)s;//计算鸟的坐标位置231 double v = v0 - g*t;//计算下次的速度232 speed = v;233 // if(y>=500){//如果到达地面，就重新抛起234 // y = 280;235 // speed = 35;236 // }237 //调用Java API提供的反正切函数，计算倾角238 alpha = Math.atan(s/8);239  }240 //在Bird中添加方法241 public void flappy(){242 //重新设置初始速度，重新向上飞243 speed = v0;244  }245 //在鸟中添加方法hit246 // 检测当前鸟是否碰到地面ground247 //如果返回true表示发生碰撞248 //否则返回false表示没有碰撞249 250 251 public boolean hit (Ground ground){252 boolean hit =y+size/2>ground.y;253 if(hit){254 y=ground.y-size/2;255 256  }257 return hit;258 }259 //检测当前鸟是否撞倒柱子260 public boolean hit(Column column){261 //先检查是否在柱子的范围以内262 if (x>column.x-column.width/2-size/2&&x<column263 .x+column.width/2+size/2){264 if(y>column.y-column.gap/2+size/2&&y<column.y+column.gap/2-size/2){265 return false;266 267 268 269  }270 return true;271 272  }273 return false;274  }275 }