Java贪吃蛇

1.GamePanel

package com.le.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 {
    int length;
    int[] snakeX=new int[600];
    int[] snakeY=new int[600];
    String fx;
    int score;

    int foodx;
    int foody;
    Random random=new Random();

    boolean isStart=false;
    boolean isFail=false;
    Timer timer=new Timer(60,this);


    public  GamePanel(){
        init();
        this.setFocusable(true);//聚焦事件
        this.addKeyListener(this);//键盘事件
    }
    public void init(){
        length=3;
        snakeX[0]=100;snakeY[0]=100;//脑袋坐标
        snakeX[1]=75;snakeY[1]=100;
        snakeX[2]=50;snakeY[2]=100;
        fx="R";
        //食物坐标
        foodx=25+25*random.nextInt(34);
        foody=75+25*random.nextInt(24);
        score=0;

        timer.start();
    }
    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);

        Data.header.paintIcon(this,g,25,11);
        g.fillRect(25,75,850,600);

        //画分数
        g.setColor(Color.white);
        g.setFont(new Font("微软雅黑",Font.BOLD,15));
        g.drawString("长度"+length,750,35);
        g.drawString("分数"+score,750,50);

        //画食物
        Data.food.paintIcon(this,g,foodx,foody);
        //画身体
        switch (fx) {
            case "R": {
                Data.right.paintIcon(this, g, snakeX[0], snakeY[0]);
                break;
            }
            case "L":
                Data.left.paintIcon(this, g, snakeX[0], snakeY[0]);
            {
                break;
            }
            case "U":
                Data.up.paintIcon(this, g, snakeX[0], snakeY[0]);
            {
                break;
            }
            case "D":
                Data.down.paintIcon(this, g, snakeX[0], snakeY[0]);
            {
                break;
            }
        }
        //Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);
        for(int i=1;i<length;i++){
            Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
        }

        //暂停
        if(!isStart){
                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);
        }
        //失败
        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",300,300);
        }

    }


    @Override
    public void actionPerformed(ActionEvent e) {
        if(isStart&& !isFail){
            //吃食物
            if(snakeX[0]==foodx&&snakeY[0]==foody){
                length++;
                score+=10;
                foodx=25+25*random.nextInt(34);
                foody=75+25*random.nextInt(24);
            }
            for(int i=length-1;i>0;i--){
                snakeX[i]=snakeX[i-1];
                snakeY[i]=snakeY[i-1];
            }
            switch (fx) {
                case "R":
                    snakeX[0] = snakeX[0] + 25;
                    if (snakeX[0] > 850) {
                        snakeX[0] = 25;
                    }
                    break;
                case "L":
                    snakeX[0] = snakeX[0] - 25;
                    if (snakeX[0] < 25) {
                        snakeX[0] = 850;
                    }
                    break;
                case "U":
                    snakeY[0] = snakeY[0] - 25;
                    if (snakeY[0] < 75) {
                        snakeY[0] = 650;
                    }

                    break;
                case "D":
                    snakeY[0] = snakeY[0] + 25;
                    if (snakeY[0] > 650) {
                        snakeY[0] = 75;
                    }
                    break;
            }
            //撞到自己失败
            for (int i=1;i<length;i++){
                if (snakeX[0]==snakeX[i]&&snakeY[0]==snakeY[i]){
                    isFail=true;
                }
            }

            repaint();
        }
        timer.start();
    }

    @Override
    public void keyTyped(KeyEvent e) {
    }

    @Override
    public void keyPressed(KeyEvent e) {
        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) {
    }
}

2.GameStart

package com.le.Snake;

import javax.swing.*;

public class StartGame  {
    public static void main(String[] args) {
        JFrame frame=new JFrame();
        frame.setBounds(10,10,900,720);
        frame.setResizable(false);
        frame.add(new GamePanel());
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


        frame.setVisible(true);
    }
}

3.Data

package com.le.Snake;

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

public class Data {
    public static URL bodyUrl=Data.class.getResource("statics/body.png");
    public static URL downUrl=Data.class.getResource("statics/down.png");
    public static URL foodUrl=Data.class.getResource("statics/food.png");
    public static URL headerUrl=Data.class.getResource("statics/header.png");
    public static URL leftUrl=Data.class.getResource("statics/left.png");
    public static URL rightUrl=Data.class.getResource("statics/right.png");
    public static URL upUrl=Data.class.getResource("statics/up.png");
    public static ImageIcon body=new ImageIcon(bodyUrl);
    public static ImageIcon down=new ImageIcon(downUrl);
    public static ImageIcon food=new ImageIcon(foodUrl);
    public static ImageIcon header=new ImageIcon(headerUrl);
    public static ImageIcon left=new ImageIcon(leftUrl);
    public static ImageIcon right=new ImageIcon(rightUrl);
    public static ImageIcon up=new ImageIcon(upUrl);

}