用Java编写贪吃蛇小游戏

//MyGameFrame类 import java.awt.Color; import java.awt.Frame; import java.awt.Graphics; import java.awt.Image; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.util.Random; /** * 游戏的主窗口 * @author zzh * */ public class MyGameFrame extends Frame { Snake snake = new Snake(250,250,10); boolean peng = false; //碰撞检测 Random randx = new Random(); Random randy = new Random(); Food food = new Food(100,100); //初始化食物 public void paint(Graphics g) { Color c = g.getColor(); g.setColor(Color.WHITE); //填充白色背景 g.fillRect(0, 0, 500, 500); g.setColor(c); snake.drawSelf(g); food.draw(g); //碰撞检测，判断蛇是否吃到了食物 //吃到食物后，改变食物出现的位置 peng = food.getRect().intersects(snake.getRect()); if(peng) { System.out.println("吃到了"); snake.snakelen +=1; food.setX(randx.nextInt(400)+40); food.setY(randy.nextInt(400)+40); System.out.println("food: "+food.getRect().x+" & "+food.getRect().y); } } class PaintThread extends Thread { public void run() { while (true) { //System.out.println("重画窗口"); repaint(); try { Thread.sleep(150); } catch (InterruptedException e) { e.printStackTrace(); } } } } //键盘监听 class KeyMonitor extends KeyAdapter{ public void keyPressed(KeyEvent e) { snake.addDirection(e); } } /** * 初始化窗口 */ public void launchFrame(){ this.setTitle("贪吃蛇"); this.setVisible(true); this.setSize(Constant.GAME_WIDTH, Constant.GAME_HEIGHT); this.setLocation(500, 180); this.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.exit(0); } }); new PaintThread().start(); addKeyListener(new KeyMonitor()); } //主函数 public static void main(String[] args) { MyGameFrame f = new MyGameFrame(); f.launchFrame(); } private Image offScreenImage = null; public void update(Graphics g) { if(offScreenImage == null) offScreenImage = this.createImage(Constant.GAME_WIDTH,Constant.GAME_HEIGHT);//这是游戏窗口的宽度和高度 Graphics gOff = offScreenImage.getGraphics(); paint(gOff); g.drawImage(offScreenImage, 0, 0, null); } } //常量类 public class Constant { public static final int GAME_WIDTH = 500; public static final int GAME_HEIGHT = 500; } //蛇类 import java.awt.Color; import java.awt.Graphics; import java.awt.Rectangle; import java.awt.event.KeyEvent; public class Snake{ boolean left = true; boolean up,right,down; double x,y; int speed; int width=10; int height=10; int len = 100; //定义蛇头保存多少个坐标值 int snakelen = 2; //蛇的初始长度 int[][] pos = new int[100][2]; //蛇头走过的所有坐标 int[][] newpos = new int[1][2]; //保存蛇头每次变化后的最新坐标 public void drawSelf(Graphics g) { Color c = g.getColor(); g.setColor(Color.RED); //填充正方形，蛇头为红色 g.fillRect((int)x, (int)y, 10, 10); g.setColor(Color.BLACK); for (int i = 1; i < snakelen; i++) { g.fillRect(pos[i][0], pos[i][1], 10, 10); } g.setColor(c); // 允许穿过边界 if(left) { if (x <=15 ) { x=478; } x -= speed; newpos[0][0] = (int)x; } if (right) { if (x >= 478) { x = 15; } x += speed; newpos[0][0] = (int)x; } if (up) { if (y <= 32) { y=479; } y -= speed; newpos[0][1] = (int)y; } if (down) { if (y >= 479) { y=32; } y += speed; newpos[0][1] = (int)y; } g.setColor(c); //中间变量，用来重组pos数组 int[][] tmp = new int[len][2]; System.arraycopy(newpos, 0, tmp, 0, 1); for (int s = 1; s < len; s++) { tmp[s][0]=pos[s-1][0]; tmp[s][1]=pos[s-1][1]; } for (int s = 0; s < len; s++) { pos[s][0]=tmp[s][0]; pos[s][1]=tmp[s][1]; } } //重载 public Snake (double x, double y,int speed) { this.x = x; this.y = y; this.speed = speed; pos[0][0] = (int)x; pos[0][1] = (int)y; newpos[0][0] = (int)x; newpos[0][1] = (int)y; } //用户碰撞检测 public Rectangle getRect() { return new Rectangle((int)x, (int)y, width, height); } // 改变方向， 不允许在同一直线上掉头 public void addDirection(KeyEvent e) { switch (e.getKeyCode()) { case KeyEvent.VK_LEFT: if(! right) { left = true; up = false; right = false; down = false; } break; case KeyEvent.VK_UP: if(! down) { left = false; up = true; right = false; down = false; } break; case KeyEvent.VK_RIGHT: if(! left) { left = false; up = false; right = true; down = false; } break; case KeyEvent.VK_DOWN: if(! up) { left = false; up = false; right = false; down = true; } break; default: break; } } } //食物类 import java.awt.Color; import java.awt.Graphics; import java.awt.Rectangle; public class Food { int x ; int y ; int width = 10; int height = 10; //重载 public Food(int x, int y) { this.x = x; this.y = y; } public void setX(int x) { this.x = x; } public void setY(int y) { this.y = y; } //用户碰撞检测 public Rectangle getRect() { return new Rectangle((int)x, (int)y, width, height); } public void draw(Graphics g) { Color c = g.getColor(); g.setColor(Color.GREEN); g.fillOval((int)x, (int)y, width, height); g.setColor(c); } }