飞机躲避炮弹---java

Posted 2021-02-08 Brave_WTZ

最近闲来无事，花了一天多的时间写了一个小游戏，虽然说游戏本身很无聊吧，但是自己也从这个过程中学到了许多东西。。。分享一下。

代码内容自行理解吧。。。

层次结构：

 

  1 package cn.sxt.game;
  2 
  3 import java.awt.Color;
  4 import java.awt.Font;
  5 import java.awt.Frame;
  6 import java.awt.Graphics;
  7 import java.awt.Image;
  8 import java.awt.event.KeyAdapter;
  9 import java.awt.event.KeyEvent;
 10 import java.awt.event.WindowAdapter;
 11 import java.awt.event.WindowEvent;
 12 import java.util.Date;
 13 
 14 import javax.swing.JFrame;
 15 
 16 /*
 17  * 飞机游戏的主窗口
 18  * @author Brave_WTZ
 19  */
 20 public class MyGameFrame extends Frame{
 21     
 22     Image bgImg = GameUtil.getImage("images/bg.jpg");
 23     Image planeImg = GameUtil.getImage("images/plane.png");
 24     
 25     Plane plane = new Plane(planeImg,250,250);
 26     Shell[] shells = new Shell[20];//声明50个炮弹
 27     
 28     Explode bao;
 29     
 30     Date startTime = new Date();
 31     Date endTime;
 32     int period;//游戏持续的时间
 33     
 34     @Override 
 35     public void paint(Graphics g) {//自动被调用
 36         Color c = g.getColor();
 37         
 38         g.drawImage(bgImg,0,0,null);
 39         
 40         plane.drawSelf(g);//画飞机
 41          
 42         /*画出所有的炮弹*/
 43         for( int i=0; i<shells.length; i++ ) {
 44             shells[i].draw(g);//画炮弹
 45             
 46             /*飞机和炮弹的碰撞检测！！！*/
 47             boolean peng = shells[i].getRect().intersects(plane.getRect());
 48             if(peng) {
 49                  plane.live = false; 
 50                  if(bao==null) {
 51                      bao = new Explode(plane.x,plane.y);
 52                       
 53                      endTime = new Date();
 54                      period = (int)((endTime.getTime()-startTime.getTime())/1000);
 55                  }                 
 56                  bao.draw(g);
 57             }
 58             if(!plane.live) {
 59                 g.setColor(Color.white);
 60                 Font f = new Font("宋体",Font.BOLD,50);
 61                 g.setFont(f);
 62                 g.drawString("时间："+period+"秒", (int)plane.x, (int)plane.y);
 63             }
 64         }
 65         
 66         g.setColor(c); 
 67     }
 68     
 69     /*定义内部类，方便实用外部类的属性*/
 70     class PaintThread extends Thread{
 71         @Override
 72         public void run() { 
 73             while(true) {//帮助我们反复重画窗口
 74                 repaint();//重画
 75                 
 76                 try {
 77                     Thread.sleep(40);/*动态视觉效果是由一帧帧照片连续而成*/
 78                 } catch (InterruptedException e) {
 79                     // TODO Auto-generated catch block
 80                     e.printStackTrace();
 81                 }
 82             }
 83         }
 84     }
 85     
 86     /* 
 87      * 定义键盘监听的内部类
 88      */
 89     class KeyMonitor extends KeyAdapter{
 90         @Override
 91         public void keyPressed(KeyEvent e) {
 92             plane.addDirection(e);
 93         } 
 94         @Override
 95         public void keyReleased(KeyEvent e) { 
 96             plane.minusDirection(e);
 97         }
 98     } 
 99     
100     /*
101      * 初始化窗口
102      */
103     public void launchFrame() {
104         this.setTitle("Brave_WZT");
105         this.setVisible(true); 
106         this.setSize(Constant.GAME_WIDTH,Constant.GAME_HEIGHT);
107         this.setLocation(300,300);
108         //正常情况下推出虚拟机操作
109         this.addWindowListener(new WindowAdapter(){
110             public void windowClosing(WindowEvent e) {
111                 System.exit(0); 
112             }
113         }); 
114         
115         new PaintThread().start();//启动线程
116         addKeyListener(new KeyMonitor());//启动键盘监听
117         
118         //初始化50个炮弹
119         for( int i=0; i<shells.length; i++ ) {
120             shells[i] = new Shell();
121         }
122     }
123     
124     /*
125      * 双缓冲技术，解决Frame中画面闪烁问题
126      */ 
127     private Image offScreenImage = null;
128      
129     public void update(Graphics g) {
130         if(offScreenImage == null)
131             offScreenImage = this.createImage(Constant.GAME_WIDTH,Constant.GAME_HEIGHT);//这是游戏窗口的宽度和高度
132          
133         Graphics gOff = offScreenImage.getGraphics();
134         paint(gOff);
135         g.drawImage(offScreenImage, 0, 0, null);
136     }   
137     
138     
139     public static void main(String[] args) {
140         MyGameFrame f = new MyGameFrame();
141         f.launchFrame();
142     
143     }
144 }

飞机游戏的主窗口

 1 package cn.sxt.game;
 2 
 3 import java.awt.Graphics;
 4 import java.awt.Image;
 5 import java.awt.event.KeyEvent;
 6 
 7 /*
 8  * 飞机类
 9  * @author Brave_WTZ
10  */
11 
12 public class Plane extends GameObject{
13     
14     boolean left,up,right,down; 
15     
16     boolean live = true;
17     
18     public Plane(Image img,double x,double y) {
19         this.img=img;
20         this.x=x;
21         this.y=y;
22         this.speed=6;
23         this.width=100;
24         this.height=100;
25     }
26     
27     public void drawSelf(Graphics g) {
28         if(live) {
29             g.drawImage(img,(int)x,(int)y,null);
30             if(left) {
31                 x-=speed;
32             }
33             if(right) {
34                 x+=speed;
35             }
36             if(up) {
37                 y-=speed;
38             }
39             if(down) {
40                 y+=speed;
41             }
42         }else {
43             
44         }
45     }
46 
47 
48     //按下某个键，启动这个方向
49     public void addDirection(KeyEvent e) {
50         switch(e.getKeyCode()) {
51         case KeyEvent.VK_LEFT:
52             left=true;
53             break;
54         case KeyEvent.VK_UP:
55             up=true;
56             break;
57         case KeyEvent.VK_RIGHT:
58             right=true;
59             break;
60         case KeyEvent.VK_DOWN:
61             down=true;
62             break;
63         }
64     }
65     //松开某个键，取消相应的方向
66     public void minusDirection(KeyEvent e) {
67         switch(e.getKeyCode()) {
68         case KeyEvent.VK_LEFT:
69             left=false;break;
70         case KeyEvent.VK_UP:
71             up=false;break;
72         case KeyEvent.VK_RIGHT:
73             right=false;break;
74         case KeyEvent.VK_DOWN:
75             down=false;break;
76         }
77     }
78 }

飞机类

 1 package cn.sxt.game;
 2 
 3 import java.awt.Color;
 4 import java.awt.Graphics;
 5 
 6 /*
 7  * 炮弹类
 8  * @author Brave_WTZ
 9  */
10 
11 public class Shell extends GameObject{
12     
13     double degree;
14     public Shell(){
15         x=200;
16         y=200;
17         width=7;
18         height=7;
19         speed=3;
20         
21         degree=Math.random()*Math.PI*2;//定义炮弹类方向
22     }
23       
24     public void draw(Graphics g) {
25         Color c = g.getColor();//tip:预先将原Graphics颜色加以保留
26         g.setColor(Color.pink); 
27         
28         g.fillOval((int)x,(int)y, width, height);/*填充pink色炮弹*/
29         
30         /*炮弹沿任意角度去飞*/
31         x+=speed*Math.cos(degree);
32         y+=speed*Math.sin(degree);
33          
34         if(x<0||x>Constant.GAME_WIDTH-width) {
35             degree = Math.PI-degree;
36 //            System.out.println("嘤嘤嘤");
37         }
38         if(y<30||y>Constant.GAME_HEIGHT-height) {
39             degree = -degree;
40 //            System.out.println("嘤嘤嘤");
41         }
42         
43         g.setColor(c); 
44     }
45 }

炮弹类

 1 package cn.sxt.game;
 2 
 3 import java.awt.Graphics;
 4 import java.awt.Image;
 5 
 6 /*
 7  * 爆炸类
 8  * @author Brave_WTZ
 9  */
10 public class Explode {
11     double x,y;
12     
13     static Image[] imgs = new Image[16];
14     static {
15         for( int i=0; i<16; i++ ) {
16             imgs[i] = GameUtil.getImage("images/explode/e"+(i+1)+".gif");
17             imgs[i].getWidth(null);
18         }
19     }
20     
21     int count;
22     
23     public void draw(Graphics g) {
24         if(count<=15) {
25             g.drawImage(imgs[count], (int)x, (int)y, null);
26             count++;
27         }
28     } 
29     public Explode(double x,double y) {
30         this.x=x;
31         this.y=y;
32     }
33 }

爆炸类

 1 package cn.sxt.game;
 2 
 3 import java.awt.Graphics;
 4 import java.awt.Image;
 5 import java.awt.Rectangle;
 6 
 7 /*
 8  * 游戏物体的父类
 9  * @author Brave_WTZ
10  */ 
11 public class GameObject {
12     Image img;
13     double x,y;
14     int speed;
15     int width,height;
16     
17     public void drawSelf(Graphics g) {
18         g.drawImage(img,(int)x,(int)y,null);
19     } 
20    
21     public GameObject(Image img, double x, double y, int speed, int width, int height) {
22         super();
23         this.img = img;
24         this.x = x;
25         this.y = y;
26         this.speed = speed; 
27         this.width = width;
28         this.height = height; 
29     } 
30 
31     public GameObject(double x, double y) {
32         super(); 
33         this.x = x;
34         this.y = y; 
35     }
36     
37     public GameObject() {  
38         
39     }
40     /*
41      * 返回物体所在矩形，便于碰撞检测
42      */
43     public Rectangle getRect() {
44         return new Rectangle((int)x,(int)y,width,height);
45     }
46     
47 }

游戏物体的父类

 1 package cn.sxt.game;
 2  
 3 import java.awt.Image;
 4 import java.awt.image.BufferedImage;
 5 import java.io.IOException;
 6 import java.net.URL;
 7 import javax.imageio.ImageIO;
 8  
 9 public class GameUtil {
10     // 工具类最好将构造器私有化。
11     private GameUtil() {
12      
13     } 
14     /* 
15      * 返回指定路径文件的图片对象
16      * 
17      */ 
18     public static Image getImage(String path) {
19         BufferedImage bi = null;
20         try {
21             URL u = GameUtil.class.getClassLoader().getResource(path);
22             bi = ImageIO.read(u);
23         } catch (IOException e) {
24             e.printStackTrace();
25         }
26         return bi;
27     }
28 }

工具类

1 package cn.sxt.game;
2 
3 public class Constant {
4 
5     public static final int GAME_WIDTH = 1024;
6     public static final int GAME_HEIGHT = 700;
7 }

常量类

看看效果图：

下面是游戏代码用到的游戏素材：