贪吃蛇

GameStart：一个开始游戏的类，有一个窗体JFrame

GameStart extends JFrame

import javax.swing.*;

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

        frame.add(new GamePanel());
        frame.setVisible(true);

    }
}

GamePanel：一个画板类，用于画所需图形等，实现了事件监听器，按键监听器

按钮监听器用于控制蛇的左右上下移动

事件监听器是用于计时器上，让蛇运动起来  Timer（100，this）

构造器

初始化方法 Initial

按钮监听器方法

事件监听器方法

package com.xan.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[] snakeX = new int[600];
    int[] snakeY = new int[600];
    int length;

    String fx;
    boolean isStart = false;
    Timer timer = new Timer(100, this);        //定时器

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

    //记录分数
    int scores ;

    //失败标志
    boolean isFail = false;

    public GamePanel() {
        init();
        this.setFocusable(true);
        this.addKeyListener(this);
        timer.start();
    }

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

        foodx = 25  + 25 * random.nextInt(34);
        foody = 75 + 25 *  random.nextInt(24);
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);        //清屏
        this.setBackground(Color.WHITE);
//        Data.header.paintIcon(this, g, 25, 11);

        g.fillRect(25, 75, 850, 600);  //游戏区域


        //画食物
        Data.food.paintIcon(this,g,foodx,foody);

        //画蛇头
        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]);
        } else if (fx.equals("L")) {
            Data.left.paintIcon(this, g, snakeX[0], snakeY[0]);
        } else if (fx.equals("R")) {
            Data.right.paintIcon(this, g, snakeX[0], snakeY[0]);
        }

        //画分数和长度
        g.setColor(Color.BLUE);
        g.setFont(new Font("微软雅黑", Font.BOLD, 20));
        g.drawString("分数："+ scores, 650, 25);
        g.drawString("长度："+ length, 650, 45);
        g.setFont(new Font("微软雅黑", Font.BOLD, 50));
        g.drawString("贪吃蛇",350,50);

        if (isStart == false) {
            g.setColor(Color.RED);
            g.setFont(new Font("微软雅黑", Font.BOLD, 49));
            g.drawString("按下空格游戏开始", 300, 300);
        }
        if (isFail == true) {
            g.setColor(Color.RED);
            g.setFont(new Font("微软雅黑", Font.BOLD, 50));
            g.drawString("游戏失败，按下空格重新开始", 200, 300);
        }

        //画蛇尾
        for (int i = 1; i < length; i++) {
            Data.body.paintIcon(this, g, snakeX[i], snakeY[i]);
        }


    }

    @Override
    public void keyPressed(KeyEvent e) {
        int keyCode = e.getKeyCode();
        if (keyCode == KeyEvent.VK_SPACE) {
            //按下空格的时候 一、重新开始游戏  二、暂停/开始游戏
            if(isFail){
                isFail = false;
                init();
            }else {
                isStart = !isStart;
            }


            repaint();
        }else 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 actionPerformed(ActionEvent e) {
        //事件的监听器，用于小蛇的移动
        if (isStart && !isFail) {
            //如果开始了，让小蛇一直移动
            for (int i = length - 1; i > 0; i--) {
                snakeX[i] = snakeX[i - 1];
                snakeY[i] = snakeY[i-1] ;
            }
            //头部移动
            if(fx.equals("R")){
                snakeX[0] += 25;
                if (snakeX[0]>850){ snakeX[0] = 25;}
            }else if (fx.equals("L")){
                snakeX[0] -= 25;
                if (snakeX[0]<25){snakeX[0] = 850; }
            }else if (fx.equals("D")){
                snakeY[0] += 25;
                if (snakeY[0]>650){ snakeY[0] = 75; }
            }else if(fx.equals("U")){
                snakeY[0] -= 25;
                if (snakeY[0]<75){ snakeY[0] = 650; }
            }
            if(foodx == snakeX[0] && foody ==snakeY[0]){
                length++;
                scores += 10;
                foodx = 25  + 25*random.nextInt(34);
                foody = 75 + 25*random.nextInt(24);
            }
            for (int i = 1; i < length; i++) {
                if (snakeX[0]== snakeX[i] && snakeY[0] ==snakeY[i]){
                    isFail = true;
                }
            }
            repaint();
        }
        timer.start();
    }


    @Override
    public void keyReleased(KeyEvent e) {

    }

    @Override
    public void keyTyped(KeyEvent e) {

    }

}

Data：用于存放数据，url

package com.xan.snake;

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

public class Data {
    //图片
    public static URL headerURL = Data.class.getResource("/static/header.png");
    public static ImageIcon header = new ImageIcon(headerURL);
    public static URL bodyURL = Data.class.getResource("/static/body.png");
    public static ImageIcon body = new ImageIcon(bodyURL);
    public static URL downURL = Data.class.getResource("/static/down.png");
    public static ImageIcon down = new ImageIcon(downURL);
    public static URL foodURL = Data.class.getResource("/static/food.png");
    public static ImageIcon food = new ImageIcon(foodURL);
    public static URL leftURL = Data.class.getResource("/static/left.png");
    public static ImageIcon left = new ImageIcon(leftURL);
    public static URL rightURL = Data.class.getResource("/static/right.png");
    public static ImageIcon right = new ImageIcon(rightURL);
    public static URL upURL = Data.class.getResource("/static/up.png");
    public static ImageIcon up = new ImageIcon(upURL);

}