java贪吃蛇小游戏_java入门简单小游戏代码[通俗易懂]

一．前言

某日，看见隔壁家的小朋友在玩一款网络爆款贪吃蛇游戏，感觉很好玩。自己刚好正在学习JAVA编程，也想实现一个类似功能的游戏Demo练手，在网上查看了不少源码案例，全都是很古老的方块式贪吃蛇游戏案例，没有想要的实现，因此自己动手实现一个JAVA版的贪吃蛇游戏。

我在这个Dome完成之后重写了这个游戏的Android版，并重新更名为《蛇王传说》。也欢迎大家下载试玩。游戏下载地址：点这里下载app

我的另一篇博客有Androd版本的游戏介绍：JAVA游戏开发-超炫酷贪吃蛇游戏源码及教程

二、实现效果

1.启动界面蛇头会左右摆动，动态效果

2、游戏主界面地图上有不同的食物，用键盘控制蛇在地图上行走，每吃掉一个食物，蛇会自动生长一节

三、按键功能说明左右键蛇转向，上键蛇加速行走。

四、美工准备

因自己不会美工，很多图都是从网上找的，然后用photoshop抠图，按自己的设计思路，做成以下样式。做片做的比较丑，就不放原图了。

1、images 文件夹

2、foolds文件夹

3、snake文件夹

4、在s0,s1,s2,s3,s4文件夹分别放以下5张图，可以做成不同颜色和样式（也就是蛇的皮肤）

五、打开Eclipse新建HawkRetroSnaker 项目，目录文件结构如下图：

从目录结构可以看出，此游戏有5个JAVA类，分别是

Foods.java (食物），

Snake.java (蛇），

SnakePlayer.java (游戏主程），

Tools.java （工具类），

UIGameStart.java (启动时的Ui).

六、游戏代码：关键代码地方都有注释，我就不多啰嗦了，代码写的比较烂，只是为了实现功能，有很多地方可以优化，大家也可提出自己的见解。

1.Foods.java

package com.hawkonline.retorsnaker;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import javax.imageio.ImageIO;

public class Foods {
	
	private int imgID;//食物图片D 以foodsX 
	private int drawX;// 图块显示中心的X位置
	private int drawY;// 图块显示中心的Y位置
	
	private int generateEnergy;//产生能量

	private  int offsetX;// 图块块显示的X位置偏移值-自动计算
	private  int offsetY;// 图块块显示的X位置偏移值-自动计算
	
	private BufferedImage imgFoods;//
	
	public Foods(int imgID, int drawX, int drawY, int generateEnergy) {
		super();

		this.imgID = imgID;
		this.drawX = drawX;
		this.drawY = drawY;
		this.generateEnergy = generateEnergy;
		
		//加载食物图片
		try {
			imgFoods= ImageIO.read(new FileInputStream("images\\foods\\foods"+imgID+".png"));
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		this.offsetX = imgFoods.getWidth()/2;
		this.offsetY = imgFoods.getHeight()/2;
	}
	
	//画食物
	public void drawFoods(Graphics cg,int x,int y ){
		cg.drawImage(imgFoods, drawX-offsetX+x, drawY-offsetY+y, null);
		cg.setColor(Color.WHITE);
		//参照线-------------------
		cg.fillRect(drawX-1+x, drawY-1+y, 2, 2);
	}

	public Foods() {
		super();
	}

	public int getImgID() {
		return imgID;
	}

	public void setImgID(int imgID) {
		this.imgID = imgID;
	}

	public int getDrawX() {
		return drawX;
	}

	public void setDrawX(int drawX) {
		this.drawX = drawX;
	}

	public int getDrawY() {
		return drawY;
	}

	public void setDrawY(int drawY) {
		this.drawY = drawY;
	}

	public int getGenerateEnergy() {
		return generateEnergy;
	}

	public void setGenerateEnergy(int generateEnergy) {
		this.generateEnergy = generateEnergy;
	}

	public int getOffsetX() {
		return offsetX;
	}

	public void setOffsetX(int offsetX) {
		this.offsetX = offsetX;
	}

	public int getOffsetY() {
		return offsetY;
	}

	public void setOffsetY(int offsetY) {
		this.offsetY = offsetY;
	}
}

大家好，最近在开发微信小程序，用了一个月的晚上时间，手撸一个仿蚂蚁森林微信小程序，欢迎大家扫描体验！

2.Snake.java

package com.hawkonline.retorsnaker;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Arrays;
import java.util.Random;

import javax.imageio.ImageIO;

public class Snake {
	private Random rand = new Random();
	private int to=0;//自动移动模式标记蛇移动的方向，1左，2右
	
	// 蛇图片相关显示属性
	private int step;// 步长
	private int offsetX;// 图块块显示的X位置偏移值-自动计算
	private int offsetY;// 图块块显示的X位置偏移值-自动计算
	private BufferedImage imgSnakeHead;// 蛇头图片
	private BufferedImage imgSnakeBody1;// 蛇身体奇数图片
	private BufferedImage imgSnakeBody2;// 蛇身体偶数图片
	private BufferedImage imgSnakeTait1;// 蛇尾巴图片
	private BufferedImage imgSnakeTait2;// 蛇尾巴图片
	private BufferedImage imgRotate;// 旋转后的图片

	// 蛇的属值
	private int energy;// 吃豆得到的能量
	private int snakeLength;// 蛇的长度--默认3节，根椐能量获得的多少自动生长

	// 蛇头
	private int snakeHeadX;// 蛇头X坐标
	private int snakeHeadY;// 蛇头Y坐标
	private int snakeHeadDirection;// 蛇头移动的方向
	private int snakeDisplayStyle;// 蛇显示风格
	private boolean snakeIsDeath;//蛇死亡标记   True-生存， false=死亡

	// 蛇身体
	private int[] bodyX;// 蛇身体X坐标
	private int[] bodyY;// 蛇身体Y坐标
	private int[] bodyDirection;// 蛇身体方向

	// 构造函数
	public Snake(int snakeHeadX, int snakeHeadY, int snakeHeadDirection, int snakeDisplayStyle) {
		super();
		this.snakeHeadX = snakeHeadX;
		this.snakeHeadY = snakeHeadY;
		this.snakeHeadDirection = snakeHeadDirection;
		this.snakeDisplayStyle = snakeDisplayStyle;
		this.snakeIsDeath = true;//蛇死亡标记   True-生存， false=死亡

		snakeLength =6;

		// 加载图片
		try {
			imgSnakeHead = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\head.png"));
			imgSnakeBody1 = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\body1.png"));
			imgSnakeBody2 = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\body2.png"));
			imgSnakeTait1 = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\tait1.png"));
			imgSnakeTait2 = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\tait2.png"));

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		this.offsetX =imgSnakeHead.getWidth()/2;
		this.offsetY =imgSnakeHead.getHeight()/2;
		this.step = 8;

		// 蛇身体-构造时为3节
		bodyX = new int[snakeLength];
		bodyY = new int[snakeLength];
		bodyDirection = new int[snakeLength];

		for (int i = 0; i < snakeLength; i++) {
			bodyX[i] = snakeHeadX - (i + 1) * step;
			bodyY[i] = snakeHeadY;
			bodyDirection[i] = 0;
		}

	}

	// 画蛇
	public void snakeShow(Graphics cg,int x,int y) {

		// 画蛇身体
		for (int i = snakeLength - 1; i >= 0; i--) {
			if (i == snakeLength - 1) {// 画蛇尾
				if ((i % 2 == 0)) {
					imgRotate = Tools.rotateImage(imgSnakeTait1, bodyDirection[i]);
				} else {
					imgRotate = Tools.rotateImage(imgSnakeTait2, bodyDirection[i]);
				}

			} else {
				// 画蛇身体
				if ((i % 2) == 0) {
					imgRotate = Tools.rotateImage(imgSnakeBody1, bodyDirection[i]);
				} else {
					imgRotate = Tools.rotateImage(imgSnakeBody2, bodyDirection[i]);
				}

			}
			cg.drawImage(imgRotate, bodyX[i] - offsetX+x, bodyY[i] - offsetY+y,null);
			// 参照线-------------------
			cg.setColor(Color.WHITE);
			cg.fillRect(bodyX[i] - 1+x, bodyY[i] - 1+y, 2, 2);
		}

		// 画蛇头
		imgRotate = Tools.rotateImage(imgSnakeHead, snakeHeadDirection);
		cg.drawImage(imgRotate, snakeHeadX - offsetX+x, snakeHeadY - offsetY+y,null);

		// 参照线-------------------
		cg.setColor(Color.WHITE);
		cg.fillRect(snakeHeadX - 1+x, snakeHeadY - 1+y, 2, 2);
		
		
		
		cg.setColor(Color.BLUE);
		int sX = (int) (snakeHeadX + 150 * Math.cos(snakeHeadDirection * 3.14 / 180));
		int sY = (int) (snakeHeadY + 150 * Math.sin(snakeHeadDirection * 3.14 / 180));
		cg.fillRect(sX - 1+x, sY - 1+y, 2, 2);
		
		sX = (int) (snakeHeadX + 100 * Math.cos((snakeHeadDirection+45) * 3.14 / 180));
		sY = (int) (snakeHeadY + 100 * Math.sin((snakeHeadDirection+45) * 3.14 / 180));
		cg.fillRect(sX - 1+x, sY - 1+y, 2, 2);
		sX = (int) (snakeHeadX + 100 * Math.cos((snakeHeadDirection-45) * 3.14 / 180));
		sY = (int) (snakeHeadY + 100 * Math.sin((snakeHeadDirection-45) * 3.14 / 180));
		cg.fillRect(sX - 1+x, sY - 1+y, 2, 2);
		// 参照线-------------------
		cg.setColor(Color.WHITE);
		cg.fillRect(snakeHeadX - 1+x, snakeHeadY - 1+y, 2, 2);
		
		

	}
	public void snakeAutoMove(){
		// 蛇智能移动方案3
		//蛇下一步的位置
		int sX = (int) (snakeHeadX + 150 * Math.cos(snakeHeadDirection * 3.14 / 180));
		int sY = (int) (snakeHeadY + 150 * Math.sin(snakeHeadDirection * 3.14 / 180));
		
		//蛇死亡了
		if(sX<=20||sX>=(Tools.MAP_X-20)||sY<=20||sY>=(Tools.MAP_Y-20)){
			boolean isL=false,isR=false;
			//看下左边45度会不会死
			sX = (int) (snakeHeadX + 100 * Math.cos((snakeHeadDirection+45) * 3.14 / 180));
			sY = (int) (snakeHeadY + 100 * Math.sin((snakeHeadDirection+45) * 3.14 / 180));
			if(sX<=20||sX>=(Tools.MAP_X-20)||sY<=20||sY>=(Tools.MAP_Y-20)){
				isL=true;
			}
			//看下左边45度会不会死
			sX = (int) (snakeHeadX + 100 * Math.cos((snakeHeadDirection-45) * 3.14 / 180));
			sY = (int) (snakeHeadY + 100 * Math.sin((snakeHeadDirection-45) * 3.14 / 180));
			if(sX<=20||sX>=(Tools.MAP_X-15)||sY<=20||sY>=(Tools.MAP_Y-15)){
				isR=true;
			}
			
			//左右死
			if((isL)&&(isL)){
				if(rand.nextInt(1)==1){
					snakeHeadDirection+=(rand.nextInt(5)+20);//增大旋转角度
					to=1;
				}else{
					snakeHeadDirection-=(rand.nextInt(5)+20);//增大旋转角度
					to=2;
				}
			}else if(isL){
				snakeHeadDirection-=(rand.nextInt(5)+5);//增大旋转角度
				to=2;
			}else{
				snakeHeadDirection+=(rand.nextInt(5)+5);//增大旋转角度
				to=1;
			}
		}else{
			if(rand.nextInt(rand.nextInt(20)+10)==1){
				to=rand.nextInt(3);
			}
			if (to==1) snakeHeadDirection+=(rand.nextInt(5)+2);
			if (to==2) snakeHeadDirection-=(rand.nextInt(5)+2);
		}
		snakeMove();


		
	}
	// 蛇移动-按照设置的方向前行
	public void snakeMove() {
		if (snakeIsDeath) {
			// 蛇的后一节的值继承前一节的值
			for (int i = snakeLength - 1; i > 0; i--) {
				bodyX[i] = bodyX[i - 1];
				bodyY[i] = bodyY[i - 1];
				bodyDirection[i] = bodyDirection[i - 1];
			}
			// 第一节的值继承蛇头的值
			bodyX[0] = snakeHeadX;
			bodyY[0] = snakeHeadY;
			bodyDirection[0] = snakeHeadDirection;

			snakeHeadX = (int) (snakeHeadX + step * Math.cos(snakeHeadDirection * 3.14 / 180));
			snakeHeadY = (int) (snakeHeadY + step * Math.sin(snakeHeadDirection * 3.14 / 180));
		}

	}

	// 蛇生长--数组自动扩容1节
	public void snakGrow() {

		snakeLength = snakeLength + 1;

		if (snakeLength > bodyX.length) {
			bodyX = Arrays.copyOf(bodyX, snakeLength);
			bodyY = Arrays.copyOf(bodyY, snakeLength);
			bodyDirection = Arrays.copyOf(bodyDirection, snakeLength);
		}

	}

	// 蛇死亡
	public void snakeDeath() {
		this.snakeIsDeath = false;//蛇死亡标记   True-生存， false=死亡
		// 随机数--产生蛇块断裂
		Random rand = new Random();
		for (int i = 0; i < snakeLength; i++) {
			bodyX[i] = bodyX[i] + rand.nextInt(step * 2) - rand.nextInt(step * 2);
			bodyY[i] = bodyY[i] + rand.nextInt(step * 2) - rand.nextInt(step * 2);
			bodyDirection[i] = bodyDirection[i] + rand.nextInt(360);
		}
		//snakeHeadX = snakeHeadX + rand.nextInt(step) - rand.nextInt(step);
		//snakeHeadY = snakeHeadY + rand.nextInt(step) - rand.nextInt(step);
		snakeHeadX = (int) (snakeHeadX + step * Math.cos(snakeHeadDirection * 3.14 / 180));
		snakeHeadY = (int) (snakeHeadY + step * Math.sin(snakeHeadDirection * 3.14 / 180));
	}


	// get---- set-----
	public int getSnakeHeadDirection() {
		return snakeHeadDirection;
	}

	public void setSnakeHeadDirection(int snakeHeadDirection) {
		this.snakeHeadDirection = snakeHeadDirection;
	}

	public int getSnakeHeadX() {
		return snakeHeadX;
	}

	public void setSnakeHeadX(int snakeHeadX) {
		this.snakeHeadX = snakeHeadX;
	}

	public int getSnakeHeadY() {
		return snakeHeadY;
	}

	public void setSnakeHeadY(int snakeHeadY) {
		this.snakeHeadY = snakeHeadY;
	}

	public boolean getSnakIsDeath() {
		return snakeIsDeath;
	}

	public boolean isSnakeIsDeath() {
		return snakeIsDeath;
	}

	public void setSnakeIsDeath(boolean snakeIsDeath) {
		this.snakeIsDeath = snakeIsDeath;
	}

	public int getEnergy() {
		return energy;
	}

	public void setEnergy(int energy) {
		this.energy = energy;
		
		if((energy-5)>=0){//每获取5点能量，蛇生长一节(12-5)>=0
			this.snakGrow();//蛇生长
			this.energy=this.energy-5;
		}
	}

	public int getSnakeLength() {
		return snakeLength;
	}

	public void setSnakeLength(int snakeLength) {
		this.snakeLength = snakeLength;
	}

	public int getSnakeDisplayStyle() {
		return snakeDisplayStyle;
	}

	public void setSnakeDisplayStyle(int snakeDisplayStyle) {
		this.snakeDisplayStyle = snakeDisplayStyle;
	}

}

3.SnakePlayer.java

package com.hawkonline.retorsnaker;

import java.awt.Color;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.Graphics;

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;

public class SnakePlayer  extends JFrame implements Runnable, KeyListener{
	Random rand = new Random();
	private int runGame=0;
	
	//UI
	private UIGameStart uiGameStart=null;
	
	private int inputSleep=80;//线程执行间隔时长

	private int drawMapX,drawMapY;
	
	private static BufferedImage bfMap= new BufferedImage(Tools.MAP_X, Tools.MAP_Y, BufferedImage.TYPE_3BYTE_BGR); // 创建一张1920＊1080的地图源图
	
    private static BufferedImage bfGameMap = new BufferedImage(Tools.SCREEN_X, Tools.SCREEN_Y, BufferedImage.TYPE_3BYTE_BGR); // 创建一张1920＊1080的缓冲图片
    private static Graphics bfGameMapGraphics =bfGameMap.getGraphics();// 获取缓冲图片的画笔
    private BufferedImage imgDisplayInformation=null;
    private BufferedImage imeGameOver=null;
    
    private Foods []foods=null;//小圆点食物
    
    private Snake snake=null;//蛇
    //private Snake enemy=null;

	public SnakePlayer() {
		
		this.setTitle(Tools.GameName);
		// 设置框架的大小
		this.setSize(Tools.SCREEN_X, Tools.SCREEN_Y);
		 // 设置框架大小可以改变
		this.setResizable(false);
		//设置窗体居中显示
		this.setLocationRelativeTo(null);
      // 设置点击关闭按钮 关闭界面
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		//设置GUI的窗口图标
		ImageIcon snakeIcon = new ImageIcon("images\\snakeIcon.png");
		this.setIconImage(snakeIcon.getImage());
		// 允许显示游戏界面
		this.setVisible(true); 
		// 添加键盘监听器  
	    this.addKeyListener(this);
	    // 添加鼠标监听器 

        //鼠标样式
		this.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
	    //创建UI界面
	    uiGameStart=new UIGameStart();
	    
	    
	    loadGameResources();//加载游戏资源
	    bfMapDraw();//画背地图，以后不用多次画了
	    setFoods();
	    setSnake();
	    
	     Thread thread = new Thread(this); // 创建线程  
	     thread.start(); // 启动线程  
	}
	
	//加载游戏资源
	private void loadGameResources() {
	    try {
			imgDisplayInformation = ImageIO.read(new FileInputStream("images\\DisplayInformation.png"));
			imeGameOver = ImageIO.read(new FileInputStream("images\\GameOver.png"));
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	//设置蛇
	private void setSnake() {
		snake=new Snake(Tools.MAP_X/2, Tools.MAP_Y/2, 0,rand.nextInt(Tools.SNAKE_STYLE_SUM));
		
//		int sx=rand.nextInt(Tools.MAP_X-40)+20;
//		int sy=rand.nextInt(Tools.MAP_Y-40)+20;
//		int sd=rand.nextInt(360);
//		int ss=rand.nextInt(Tools.SNAKE_STYLE_SUM);
//
//		enemy=new Snake(sx, sy, sd, ss);
	}

	// 设置食物
	private void setFoods() {

		foods=new Foods[Tools.FOODS_SUM];
		for(int i=0;i<Tools.FOODS_SUM;i++){

				int imgID=rand.nextInt(Tools.FOODS_TYPE_SUM);
				int drawX=rand.nextInt(Tools.MAP_X-40)+20;
				int drawY=rand.nextInt(Tools.MAP_Y-40)+20;
				//-------------可设计从XML文件读入
				int generateEnergy;
				if (imgID<7){
					generateEnergy=1;
				}else {
					generateEnergy=5;
				}
				foods[i]=new Foods(imgID, drawX, drawY, generateEnergy);
		}

	}
	// 设置游戏地图
	private void bfMapDraw() {
		Graphics bfMapGraphics =bfMap.getGraphics();// 获取缓冲图片的画笔
		
		bfMapGraphics.setColor(Color.BLACK); // 设置map外框为黑色
		bfMapGraphics.fillRect(0, 0, Tools.MAP_X, Tools.MAP_Y);

		bfMapGraphics.setColor(new Color(90, 90, 90)); // 设置map墙为黑色
		bfMapGraphics.fillRect(10, 10, Tools.MAP_X - 20, Tools.MAP_Y - 20);

		bfMapGraphics.setColor(new Color(208, 208, 224)); // 设置map背景色
		bfMapGraphics.fillRect(20, 20, Tools.MAP_X - 40, Tools.MAP_Y - 40);
		// 画map格
		bfMapGraphics.setColor(new Color(241, 241, 240));
		for (int i = 20; i < Tools.MAP_Y; i += 20) {
			bfMapGraphics.drawLine(0 + 12, i, Tools.MAP_X -12, i);
		}

		for (int j = 20; j < Tools.MAP_X; j += 20) {
			bfMapGraphics.drawLine(j, 0 + 12, j, Tools.MAP_Y - 12);
		}
	}
	
	public void reDrawGame(){
		
		//得到画地图的偏移值
		drawMapX=-snake.getSnakeHeadX()+Tools.SCREEN_X/2;
		drawMapY=-snake.getSnakeHeadY()+Tools.SCREEN_Y/2;
		
		//画地图背景
		bfGameMapGraphics.setColor(Color.red);
		bfGameMapGraphics.fillRect(0, 0, Tools.SCREEN_X, Tools.SCREEN_Y);
		
		bfGameMapGraphics.drawImage(bfMap, drawMapX, drawMapY, null);//显示第一层背景地图
		
		for(int i=0;i<Tools.FOODS_SUM;i++){

			int distance = (int) Math.sqrt(Math.abs((foods[i].getDrawX() -  snake.getSnakeHeadX())*(foods[i].getDrawX() -  snake.getSnakeHeadX()))+Math.abs((foods[i].getDrawY() -  snake.getSnakeHeadY())*(foods[i].getDrawY() -  snake.getSnakeHeadY())));
			
			if (distance<25){//如果贪吃蛇离食物有20，测吃掉食物
				
				snake.setEnergy(snake.getEnergy()+foods[i].getGenerateEnergy());//能量加
				
				//产生新的食物

				foods[i].setDrawX(rand.nextInt(Tools.MAP_X-40)+20);
				foods[i].setDrawY(rand.nextInt(Tools.MAP_Y-40)+20);
			}
			foods[i].drawFoods(bfGameMapGraphics, drawMapX,drawMapY);

	}
		//===============================================
		if (snake.getSnakIsDeath()){//如果蛇在活着
			//snake.snakeMove();//蛇移动
			snake.snakeAutoMove();
			
			//判断蛇是否撞墙
			if(snake.getSnakeHeadX()<=20||snake.getSnakeHeadX()>=(Tools.MAP_X-20)||snake.getSnakeHeadY()<=20||snake.getSnakeHeadY()>=(Tools.MAP_Y-20)){
				snake.snakeDeath();//蛇死亡了
				runGame=2;//游戏结束
			}
		}

		snake.snakeShow(bfGameMapGraphics,drawMapX,drawMapY);

	}
	


	public void paint(Graphics gr) {
		switch (runGame){
		case 0:
			uiGameStart.drawUIGameStart(bfGameMapGraphics);
			gr.drawImage(bfGameMap,0,0, null); // 将缓冲map
			break;
		case 1:
			reDrawGame();
			//显示得分
			showDisplayInformation();
			gr.drawImage(bfGameMap,0,0, null); // 将缓冲map
			
            break;
		case 2:
			reDrawGame();

			showDisplayInformation();
			bfGameMapGraphics.drawImage(imeGameOver,250,100, null);
			
			gr.drawImage(bfGameMap,0,0, null); // 将缓冲map
			break;
			
		default:
			break;
			
		}

 }  


		//显示得分
		private void showDisplayInformation() {
			bfGameMapGraphics.drawImage(imgDisplayInformation,300,30, null); 
			bfGameMapGraphics.setColor(Color.RED);
			bfGameMapGraphics.setFont(new Font("arial",Font.BOLD, 30));
			bfGameMapGraphics.drawString(snake.getSnakeLength()+"", 460, 66);
			bfGameMapGraphics.drawString(snake.getEnergy()+"", 680, 66);
	}

		/** 
	     * 线程执行方法 
	     */  
	    public void run() {  
	        try {  
	            while (true) {  
	                this.repaint();  
	                Thread.sleep(inputSleep);  
	            }  
	        } catch (InterruptedException e) {  
	            e.printStackTrace();  
	        }  
	    }  
	  
	    /** 
	     * 按下时调用 
	     */  
	    public void keyPressed(KeyEvent e) {  
	    	
	        int keyCode = e.getKeyCode();
	        
	        //	游戏刚启动时，按任意键开始游戏        
	        if (runGame==0){
	    		runGame=1;
	    	}
	        
	        if (keyCode ==KeyEvent.VK_LEFT&&runGame==1) { // 左按键  
	        	snake.setSnakeHeadDirection(snake.getSnakeHeadDirection()-5);//蛇左转
	        }  
	        if (keyCode == KeyEvent.VK_RIGHT&&runGame==1) { // 右按键  
	        	snake.setSnakeHeadDirection(snake.getSnakeHeadDirection()+5);//蛇右转
	        }  
	       if(keyCode==KeyEvent.VK_UP&&runGame==1){//加速
	    	   inputSleep=20;
	       }
	       if(keyCode==KeyEvent.VK_L&&runGame==2){//复活

	    	   snake.setSnakeHeadX(Tools.MAP_X/2);
	    	   snake.setSnakeHeadY(Tools.MAP_Y/2);
	    	   runGame=1;
	    	   snake.setSnakeIsDeath(true);
	       }
	       if(keyCode==KeyEvent.VK_Y&&runGame==2){//重新开始
	    	   snake.setSnakeHeadX(Tools.MAP_X/2);
	    	   snake.setSnakeHeadY(Tools.MAP_Y/2);
	    	   snake.setSnakeLength(3);
	    	   snake.setEnergy(0);
	    	   runGame=1;
	    	   snake.setSnakeIsDeath(true);
	       }
	    }  
	  
	    /** 
	     * 释放按键时调用 
	     */  
	    public void keyReleased(KeyEvent e) {  
	    	 int keyCode = e.getKeyCode(); 
	    	 if(keyCode==KeyEvent.VK_UP){
		    	   inputSleep=80;
		       }
	    }  
	  
	    /** 
	     * 不解释 
	     */  
	    public void keyTyped(KeyEvent e) {  
	  
	    }  
	  
	    public static void main(String[] args) {  
	        new SnakePlayer();  
	    }

	}

4、Tools.java

package com.hawkonline.retorsnaker;

import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;

public class Tools {
	public static final int MAP_X = 1920;
	public static final int MAP_Y = 1080;
	public static final int SCREEN_X = 800;
	public static final int SCREEN_Y = 600;
	public static final String GameName = "美卡贪吃蛇1.0.0";

	public final static int FOODS_TYPE_SUM = 19;// 食物种类
	public final static int FOODS_SUM = 50;// 小圆食物总数
	public final static int SNAKE_STYLE_SUM = 6;// 蛇皮肤总数
	public final static int SNAKE__SUM=10;//蛇的数量
	
	/**
	 * 旋转图片为指定角度
	 * 
	 * @param bufferedimage
	 *            目标图像
	 * @param degree
	 *            旋转角度
	 * @return
	 */
	public final static BufferedImage rotateImage(final BufferedImage bufferedimage, final int degree) {
		int w = bufferedimage.getWidth();// 得到图片宽度。
		int h = bufferedimage.getHeight();// 得到图片高度。
		int type = bufferedimage.getColorModel().getTransparency();// 得到图片透明度。
		BufferedImage img;// 空的图片。
		Graphics2D graphics2d;// 空的画笔。
		(graphics2d = (img = new BufferedImage(w, h, type)).createGraphics())
				.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
		graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2);// 旋转，degree是整型，度数，比如垂直90度。
		graphics2d.drawImage(bufferedimage, 0, 0, null);// 从bufferedimagecopy图片至img，0,0是img的坐标。
		graphics2d.dispose();
		return img;// 返回复制好的图片，原图片依然没有变，没有旋转，下次还可以使用。
	}

}

5、UIGameStart.java

package com.hawkonline.retorsnaker;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import javax.imageio.ImageIO;


public class UIGameStart {

	private BufferedImage gameStart=null;
    private BufferedImage snakeImage=null;
    private BufferedImage snakeTxt=null;
    private BufferedImage imgRotate;// 旋转后的图片
    private int retate=0;
    private boolean left=true;
    
    public UIGameStart() {
    	try {
    		gameStart = ImageIO.read(new FileInputStream("images\\gameStart.png"));
    		snakeImage = ImageIO.read(new FileInputStream("images\\snakeImage.png"));
    		snakeTxt = ImageIO.read(new FileInputStream("images\\snakeTxt.png"));
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
   
	}
    public void drawUIGameStart(Graphics cg){
    	cg.setColor(Color.BLACK);
    	cg.fillRect(0, 0, Tools.SCREEN_X, Tools.SCREEN_Y);
    	//画背景
    	cg.drawImage(gameStart,0, 0, Tools.SCREEN_X, Tools.SCREEN_Y,null);
    	
    	//蛇头动画参数
    	if (left){
    		retate+=2;
    		if (retate==20) left=false;
    		
    	}else{
    		retate-=2;
    		if (retate==-20) left=true;
    	}
    	
    	imgRotate = Tools.rotateImage(snakeImage, retate);
    	
    	//居中显示
    	cg.drawImage(imgRotate, (Tools.SCREEN_X-snakeImage.getWidth())/2, (Tools.SCREEN_Y-snakeImage.getHeight())/2, null);
    	cg.drawImage(snakeTxt, (Tools.SCREEN_X-snakeTxt.getWidth())/2, (Tools.SCREEN_Y-snakeTxt.getHeight())/2, null);
    	
    	cg.setColor(Color.RED);
    	cg.setFont(new Font("arial",Font.BOLD, 30));	
    }
}

直接运行。完工！！

snake.snakeAutoMove()是自动行走模式，实现了简单的AI智能,经测试蛇在地图上可以长时间不撞墙死掉。

如果改为snake.snakeMove()是手动操控模式。

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