贪吃蛇代码史上最详细的分析，内附源码，图片地址-CFANZ编程社区

1.建立工程

新建一个目录入图放置就可以

![image-20220404150523201](C:\Users\32302\AppData\Roaming\Typora\typora-user-images\image-20220404150523201.png)
代码如下：按顺序进行复制即可
Data.java:

package com.mc.snake;

import javax.swing.*;
import java.net.URL;

public class Data {

    //变成一个图标的点
    public static URL upURL=Data.class.getResource("/statics/up.png");
    public static URL downURL=Data.class.getResource("/statics/down.png");
    public static URL rightURL=Data.class.getResource("/statics/right.png");
    public static URL leftURL=Data.class.getResource("/statics/left.png");

    public static ImageIcon up = new ImageIcon(upURL);
    public static ImageIcon down = new ImageIcon(downURL);
    public static ImageIcon right = new ImageIcon(rightURL);
    public static ImageIcon left = new ImageIcon(leftURL);

    public static URL bodyURL=Data.class.getResource("/statics/body.png");
    public static ImageIcon body = new ImageIcon(bodyURL);

    public static URL foodURL=Data.class.getResource("/statics/food.png");
    public static ImageIcon foot=new ImageIcon(foodURL);



}

GamePanel:

package com.mc.snake;

import javax.swing.*;
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;

public class GamePanel extends JPanel implements KeyListener, ActionListener {

    //定义蛇的数据结构
    int length;
    int [] snackX = new int[600];
    int [] snackY = new int[600];
    String fx;

    //游戏当前的状态：开始，停止
    boolean isStart= false;

    //设置一个定时器
    Timer timer=new Timer(100,this);  //100毫秒刷新一次

    //食物的坐标
    int foodx,foody;
    Random random=new Random();

    //失败判断
    boolean isFail=false;

    //积分
    int score;


    public GamePanel(){
        init();
        setFocusable(true);     //获取焦点事件
        addKeyListener(this);
        timer.start();

    }

    public void init(){
        length=3;
        snackX[0]= 100; snackY[0]= 100;
        snackX[1]= 75; snackY[1]= 100;
        snackX[2]= 50; snackY[2]= 100;
        fx="R";

        score=0;

        foodx=25+25*random.nextInt(34);
        foody=25+25*random.nextInt(24);
    }



    //绘制面板
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);  //清屏的作业
        this.setBackground(Color.WHITE);
        //绘制静态的面板
        //初始化小蛇

        if (fx.equals("R")){    //控制蛇头的方向
            Data.right.paintIcon(this,g,snackX[0],snackY[0]);
        }else
        if (fx.equals("L")){    //控制蛇头的方向
            Data.left.paintIcon(this,g,snackX[0],snackY[0]);
        }else
        if (fx.equals("U")){    //控制蛇头的方向
            Data.up.paintIcon(this,g,snackX[0],snackY[0]);
        }else
        if (fx.equals("D")){    //控制蛇头的方向
            Data.down.paintIcon(this,g,snackX[0],snackY[0]);
        }
      /*  Data.body.paintIcon(this,g,snackX[1],snackY[1]);
        Data.body.paintIcon(this,g,snackX[2],snackY[2]);*/
        for (int i=1;i<length;i++){
            Data.body.paintIcon(this,g,snackX[i],snackY[i]);
        }

        if (isStart==false){
            g.setColor(Color.white);
            g.setFont(new Font("微软雅黑",Font.BOLD,40));
            g.drawString("按下空格开始游戏",300,300);
        }

        //花食物
        Data.foot.paintIcon(this,g,foodx,foody );

        if (isFail){
            g.setColor(Color.red);
            g.setFont(new Font("微软雅黑",Font.BOLD,40));
            g.drawString("失败，按下空格重新开始游戏",300,300);
        }


        //画积分
        g.setColor(Color.red);
        g.setFont(new Font("微软雅黑",Font.BOLD,18));
        g.drawString("长度"+length,750,35);
        g.drawString("分数"+score,750,55);

    }


    @Override
    public void keyPressed(KeyEvent e) {    //小蛇移动的方向
        int keyCode = e.getKeyCode();
        if (keyCode==KeyEvent.VK_SPACE){
            if (isFail){
                isFail=false;
                init();
            }else {
                isStart = !isStart;
            }
        }
        repaint();
        if (keyCode==KeyEvent.VK_UP){
                 fx="U";
        } else if (keyCode==KeyEvent.VK_DOWN){
                fx="D";
        } else if (keyCode==KeyEvent.VK_LEFT){
                fx="L";
        } else if (keyCode==KeyEvent.VK_RIGHT){
                fx="R";
        }

    }

    @Override
    public void keyReleased(KeyEvent e) {}
    @Override
    public void keyTyped(KeyEvent e) {}

    @Override
    public void actionPerformed(ActionEvent e) {
        if (isStart&&isFail==false){
            for (int i=length-1;i>0;i--){    //方便书写
                snackX[i]=snackX[i-1];          //后面一节变成前面一节的位置，动起来
                snackY[i]=snackY[i-1];
            }
            if (fx.equals("R")){
                snackX[0]=snackX[0]+25;
                if (snackX[0]>850){
                    snackX[0]=25;
                }
            }else if (fx.equals("L")){
                snackX[0]=snackX[0]-25;
                if (snackX[0]<25){
                    snackX[0]=850;
                }
            }else if (fx.equals("U")){
                snackY[0]=snackY[0]-25;
                if(snackY[0]<75){
                    snackY[0]=650;
                }
            }else if (fx.equals("D")){
                snackY[0]=snackY[0]+25;
                if (snackY[0]>650){
                    snackY[0]=75;
                }
            }

            //吃食物
             if(snackX[0]==foodx&&snackY[0]==foody){
                 length++;
                 //在次初始化食物
                 score=score+10;
                 foodx=25+25*random.nextInt(34);
                 foody=25+25*random.nextInt(24);

             }

             //失败判定
            for (int i=1 ;i<length;i++){
                if (snackX[0]==snackX[i]&&snackY[0]==snackY[i]){
                    isFail=true;
                }
            }

            repaint();
        }
        timer.start();

    }
}

3.StartGame.java

package com.mc.snake;

import javax.swing.*;

public class  StartGame {
    public static void main(String[] args) {
        JFrame frame = new JFrame();

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        frame.setBounds(10,10,900,720);
        frame.setResizable(false);

        frame.add(new GamePanel());
    }
}