第一个小项目贪吃蛇java实现（有功能待完善！）

代码演示：

本项目参照网上学习制作，素材均来源于网络！

package wwl.snake;
import javax.swing.*;
/**
 * 开始游戏类
 * @author 王
 *
 */
public class StartGames {
	public static void main(String[] args) {
		//1.绘制静态窗口  JFrame
		JFrame frame = new JFrame("第一个项目贪吃蛇");//wwl是标题
		//设置界面大小
		frame.setBounds(10, 10, 900, 720);
		frame.setResizable(false);//窗口大小不可改变
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置关闭事件游戏可关闭
		
		//2.面板 Jpanel 可以加入到JFrame
		frame.add(new Gamepanel());
		
		frame.setVisible(true);//让窗口能够展现出来
	}
}

package wwl.snake;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Random;
import javax.swing.*;
/**
 * 第一个项目贪吃蛇！！
 * @author 王
 *游戏主类
 */
public class Gamepanel extends JPanel implements KeyListener, ActionListener{  //监听键盘的操作implements KeyListener
	
	int lenth;//蛇的长度
	int[] snakeX = new int [600];//蛇的坐标x
	int[] snakeY = new int [500];//蛇的坐标y
	String fx;//R:右  L:左  U:上  D:下
	
	boolean isStart = false;//游戏是否开始
	
	Timer timer = new Timer(150, this);//定时器
	
	//1.定义一个食物
	int foodx;
	int foody;
	int foodredx;
	int foodredy;
	int foodfailx;
	int foodfaily;
	int foodbigx;
	int foodbigy;
	Random random = new Random();
	
	
	//死亡判断：
	boolean isFail = false;
	
	//积分系统：
	int score;
	
	//构造器
	public Gamepanel() {
		init();//初始化
		//获取键盘监听事件
		this.setFocusable(true);//键盘焦点聚集在游戏上
		this.addKeyListener(this);//添加当前这个监听类
		timer.start();//让时间动起来
	}
	
	//初始化
	public void init() {
		lenth = 3;
		snakeX[0] = 100;snakeY[0] = 100;//头部坐标
		snakeX[1] = 75;snakeY[1] = 100;//第一个身体坐标
		snakeX[2] = 50;snakeY[2] = 100;//第二个身体坐标
		fx = "R";
		foodx = 25+25*random.nextInt(34);
		foody = 75+25*random.nextInt(24);
		foodredx = 25+25*random.nextInt(34);
		foodredy = 75+25*random.nextInt(25);
		foodfailx = 25+25*random.nextInt(34);
		foodfaily = 75+25*random.nextInt(25);
		foodbigx = 25+25*random.nextInt(34);
		foodbigy = 75+25*random.nextInt(25);
		score = 0;
	}
	
	//画板：画界面，画蛇
	//Graphics（g）:画笔
	//重写父类画板方法
	@Override
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);//清屏
		this.setBackground(Color.white);//设置背景为黑色
		
		//绘制头部广告栏
		Data.heade.paintIcon(this, g, 25, 11);
		//绘制游戏区域
		g.fillRect(25, 75, 850, 600);
		
		//画一条静态的小蛇
		if(fx.equals("R")) {//判断方向
			Data.right.paintIcon(this, g, snakeX[0], snakeY[0]);
		}else if(fx.equals("L")) {
			Data.left.paintIcon(this, g, snakeX[0], snakeY[0]);
		}else if(fx.equals("U")) {
			Data.up.paintIcon(this, g, snakeX[0], snakeY[0]);
		}else if(fx.equals("D")) {
			Data.down.paintIcon(this, g, snakeX[0], snakeY[0]);
		}
		for(int i = 1; i < lenth; i++) {
			Data.body.paintIcon(this, g, snakeX[i], snakeY[i]);//蛇的身体长度通过length控制
		}
		
		//画积分
		
		g.setColor(Color.black);
		g.setFont(new Font("微软雅黑",Font.BOLD,18));
		g.drawString("长度：" + lenth, 750, 35);
		g.drawString("分数：" + score, 750	, 56);
		//画食物
		Data.food.paintIcon(this, g, foodx, foody);
		Data.foodred.paintIcon(this, g, foodredx, foodredy);
		Data.foodfail.paintIcon(this, g, foodfailx, foodfaily);
		Data.foodbig.paintIcon(this, g, foodbigx, foodbigy);
		
		//游戏提示：是否开始
		if(isStart == false) {
			//画一个文字：String
			g.setColor(Color.yellow);//设置画笔颜色
			g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
			g.drawString("请按空格开始游戏", 300, 300);//画文字
		}
		
		//食物提示：
		g.setColor(Color.black);
		g.setFont(new Font("微软雅黑",Font.BOLD,18));
		Data.foodred.paintIcon(this, g, 600, 35);
		g.drawString("红色食物身体减小：", 530, 35);
		Data.foodfail.paintIcon(this, g, 385, 35);
		g.drawString("毒物直接结束游戏：", 350, 35);
		Data.foodbig.paintIcon(this, g, 185, 35);
		g.drawString("身体增加两个：", 150, 35);
		
		//失败提醒：
		if(isFail) {
			//画一个文字：String
			g.setColor(Color.red);//设置画笔颜色
			g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
			g.drawString("游戏失败，按空格重新开始游戏", 200, 300);//画文字
		}
	}
	
	//接受键盘的收入：监听
	@Override
	public void keyPressed(KeyEvent e) {   //键盘按下，未释放
		//获取按下的键盘是哪个键
		int keyCode = e.getKeyCode();
		if(keyCode == KeyEvent.VK_SPACE) {//如果按下的是空格按键
			if(isFail) {//失败，游戏再来一遍
				isFail = false;
				init();//重新初始化游戏
			}else {
				isStart = !isStart;//取反
			}
			repaint();//不停的刷新界面
		}
		
		//键盘控制走向
		if(keyCode == KeyEvent.VK_LEFT) {
			fx = "L";
		}else if(keyCode == KeyEvent.VK_RIGHT) {
			fx = "R";
		}else if(keyCode == KeyEvent.VK_DOWN) {
			fx = "D";
		}else if(keyCode == KeyEvent.VK_UP) {
			fx = "U";
		}
		
	}
	//定时器，监听时间流动，帧:执行定时操作
	@Override
	public void actionPerformed(ActionEvent e) {
		//如果游戏处于开始状态,并且游戏没失败
		if(isStart && isFail == false) {
			//右移
			for(int i = lenth - 1; i > 0; i--) {//除了脑袋，身体都向前移动
				snakeX[i] = snakeX[i-1];
				snakeY[i] = snakeY[i-1];
			}
			//通过控制方向让头部移动
			if(fx.equals("R")){
				snakeX[0] = snakeX[0] + 25;//头部移动
				//边界判断：
				if(snakeX[0] > 850) {
					isFail = true;
				}
			}else if(fx.equals("L")) {
				snakeX[0] = snakeX[0] - 25;//头部移动
				//边界判断：
				if(snakeX[0] < 25) {
					isFail = true;
				}
			}else if(fx.equals("U")) {
				snakeY[0] = snakeY[0] - 25;//头部移动
				//边界判断：
				if(snakeY[0] < 75) {
					isFail = true;
				}
			}else if(fx.equals("D")) {
				snakeY[0] = snakeY[0] + 25;//头部移动
				//边界判断：
				if(snakeY[0] > 700) {
					isFail = true;
				}
			}
			//如果小蛇头和食物坐标重合
			if(snakeX[0] == foodx && snakeY[0] ==foody) {
				//长度加1
				lenth++;
				score = score + 5;
				//重新生成食物
				foodx = 25+25*random.nextInt(32);
				foody = 75+25*random.nextInt(22);
				foodredx = 25+25*random.nextInt(32);
				foodredy = 75+25*random.nextInt(22);
				foodbigx = 25+25*random.nextInt(32);
				foodbigy = 75+25*random.nextInt(22);
			}
			if(snakeX[0] == foodredx && snakeY[0] ==foodredy) {
				//身体减小
				lenth--;
				score = score - 5;
				//重新生成食物
				foodredx = 25+25*random.nextInt(32);
				foodredy = 75+25*random.nextInt(22);
				foodx = 25+25*random.nextInt(32);
				foody = 75+25*random.nextInt(22);
				foodbigx = 25+25*random.nextInt(32);
				foodbigy = 75+25*random.nextInt(22);
			}
			if(snakeX[0] == foodbigx && snakeY[0] ==foodbigy) {
				//长度加2
				lenth+=2;
				score = score + 10;
				//重新生成食物
				foodx = 25+25*random.nextInt(32);
				foody = 75+25*random.nextInt(22);
				foodredx = 25+25*random.nextInt(32);
				foodredy = 75+25*random.nextInt(22);
				foodbigx = 25+25*random.nextInt(32);
				foodbigy = 75+25*random.nextInt(22);
			}
			
			if(snakeX[0] == foodfailx && snakeY[0] ==foodfaily) {
				//死亡
				isFail = true;
			}
			
			//结束判断
			for (int i = 1; i < lenth; i++) {
				if(snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]) {
					isFail = true;
					init();
				}
			}
		
			//刷新界面
			repaint();
		}
		timer.start();//让时间动起来
	}
	@Override
	public void keyReleased(KeyEvent e) {
		//释放某个键
	}
	@Override
	public void keyTyped(KeyEvent e) {
		//键盘按下，弹起
	}


	
}

package wwl.snake;
/**
 * 存放外部数据
 * @author 王
 *
 */

import java.net.URL;

import javax.swing.ImageIcon;

public class Data {
	//头部图片 URL:定位图片的地址      ImageIcon:图片
	public static URL hedreUrl = Data.class.getResource("/stati/header.png");
	public static ImageIcon heade = new ImageIcon(hedreUrl);
	
	//头部：
	public static URL upUrl = Data.class.getResource("/stati/up.png");
	public static ImageIcon up = new ImageIcon(upUrl);
	//下头
	public static URL dowUrl = Data.class.getResource("/stati/down.png");
	public static ImageIcon down = new ImageIcon(dowUrl);
	//左头
	public static URL leftUrl = Data.class.getResource("/stati/left.png");
	public static ImageIcon left = new ImageIcon(leftUrl);
	//右头
	public static URL rightUrl = Data.class.getResource("/stati/right.png");
	public static ImageIcon right = new ImageIcon(rightUrl);
	//身体
	public static URL bodyUrl = Data.class.getResource("/stati/body.png");
	public static ImageIcon body = new ImageIcon(bodyUrl);
	//食物
	public static URL foodUrl = Data.class.getResource("/stati/food.png");
	public static ImageIcon food = new ImageIcon(foodUrl);
	//红色减小身体
	public static URL foodredUrl = Data.class.getResource("/stati/foodred.png");
	public static ImageIcon foodred = new ImageIcon(foodredUrl);
	//毒物结束游戏
	public static URL foodfailUrl = Data.class.getResource("/stati/foodfail.png");
	public static ImageIcon foodfail = new ImageIcon(foodfailUrl);
	//吃一个长两个身体
	public static URL foodbigUrl = Data.class.getResource("/stati/foodbig.png");
	public static ImageIcon foodbig = new ImageIcon(foodbigUrl);
}

预览图：

像其它功能如加速功能目前还没补充，包括按了左不能直接按右的判断没有完善！