Java如何实现简易GUI贪吃蛇小游戏

小编给大家分享一下Java如何实现简易GUI贪吃蛇小游戏，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

主启动类

import javax.swing.*;/** * @author The Setting sun * @create 2021-09-11 15:19 *///主启动类public class StartGame {    public static void main(String[] args) {        JFrame frame = new JFrame();        frame.setResizable(false);//窗口大小不可变        frame.setSize(900, 720);//窗口大小        frame.setLocationRelativeTo(null);//窗口居中        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);//窗口关闭事件        frame.add(new GamePanel());        frame.setVisible(true);//窗口可见    }}

资源类（图标）

import javax.swing.*;import java.net.URL;/**@author The Setting sun@create 2021-09-11 15:40*/public class Data {    public static URL headerURL = Data.class.getResource("img/header.png");    public static ImageIcon header = new ImageIcon(headerURL);    public static URL upURL = Data.class.getResource("img/tx.png");    public static ImageIcon up = new ImageIcon(upURL);    public static URL downURL = Data.class.getResource("img/down.png");    public static ImageIcon down = new ImageIcon(downURL);    public static URL rightURL = Data.class.getResource("img/right.png");    public static ImageIcon right = new ImageIcon(rightURL);    public static URL leftURL = Data.class.getResource("img/left.png");    public static ImageIcon left = new ImageIcon(leftURL);    public static URL bodyURL = Data.class.getResource("img/body.png");    public static ImageIcon body = new ImageIcon(bodyURL);    public static URL foodURL = Data.class.getResource("img/food.png");    public static ImageIcon food = new ImageIcon(foodURL);}

程序类

import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.util.Random;/** * @author The Setting sun * @create 2021-09-11 15:24 *///游戏面板public class GamePanel extends JPanel implements KeyListener, ActionListener {    //蛇    int length;//蛇的长度    int[] snakeX = new int[600];//蛇的x坐标 25*25    int[] snakeY = new int[500];//蛇的y坐标 25*25    String orient;//初始方向    //食物    int foodX;    int foodY;    Random random = new Random();    boolean isStart = false;//游戏当前状态：默认为停止    boolean isFail = false;//游戏是否失败了，默认为没有    int score;//积分    //定时器 ms为单位    Timer timer = new Timer(140, this);//100毫秒刷新一次    //构造器    public GamePanel() {        init();//初始化        setFocusable(true);//获得焦点        addKeyListener(this);//获得键盘监听事件        timer.start();//游戏一开始定时器就启动    }    //初始化    public void init() {        length = 3;//初始长度为3        snakeX[0] = 100;        snakeY[0] = 100;//头的坐标        snakeX[1] = 75;        snakeY[1] = 100;//第1个身体的坐标        snakeX[2] = 50;        snakeY[2] = 100;//第2个身体的坐标        orient = "R";//初始方向向右        //让食物随机分布在界面上        foodX = 25 + 25 * random.nextInt(34);        foodY = 75 + 25 * random.nextInt(24);        score = 0;//积分    }    //绘制面板，游戏中的东西都用这个来画    @Override    protected void paintComponent(Graphics g) {        super.paintComponent(g);//清屏        setBackground(Color.pink);        //绘制静态面板        Data.header.paintIcon(this, g, 25, 11);        g.fillRect(25, 75, 850, 600);        //绘制积分面板        g.setColor(Color.GREEN);        g.setFont(new Font("微软雅黑", Font.BOLD, 16));        g.drawString("长度：" + length, 750, 35);        g.drawString("积分：" + score, 750, 50);        //绘制食物        Data.food.paintIcon(this, g, foodX, foodY);        //绘制蛇        switch (orient) {            case "R":                Data.right.paintIcon(this, g, snakeX[0], snakeY[0]);//蛇初始化向右，通过判断转变方向                break;            case "L":                Data.left.paintIcon(this, g, snakeX[0], snakeY[0]);//蛇初始化向右，通过判断转变方向                break;            case "U":                Data.up.paintIcon(this, g, snakeX[0], snakeY[0]);//蛇初始化向右，通过判断转变方向                break;            case "D":                Data.down.paintIcon(this, g, snakeX[0], snakeY[0]);//蛇初始化向右，通过判断转变方向                break;        }        //动态添加身体        for (int i = 1; i < length; i++) {            Data.body.paintIcon(this, g, snakeX[i], snakeY[i]);        }//        Data.body.paintIcon(this,g,snakeX[1],snakeY[1]);//第1个身体的坐标//        Data.body.paintIcon(this,g,snakeX[2],snakeY[2]);//第2个身体的坐标        //游戏状态        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);        }        if (isFail) {            g.setColor(Color.RED);            g.setFont(new Font("微软雅黑", Font.BOLD, 40));            g.drawString("犹豫就会败北！", 300, 300);        }    }    //键盘监听器    @Override    public void keyPressed(KeyEvent e) {//按下        int keyCode = e.getKeyCode();//获得键盘按键码        if (keyCode == KeyEvent.VK_SPACE) {//按下空格            if (isFail) {                //重新开始                isFail = false;                init();            } else {                isStart = !isStart;//取反                repaint();            }        }        //修复了一个蛇可以反向移动的bug        if (orient.equals("U") && keyCode == KeyEvent.VK_DOWN){            keyCode = KeyEvent.VK_UP;        }        if (orient.equals("D") && keyCode == KeyEvent.VK_UP){            keyCode = KeyEvent.VK_DOWN;        }        if (orient.equals("L") && keyCode == KeyEvent.VK_RIGHT){            keyCode = KeyEvent.VK_LEFT;        }        if (orient.equals("R") && keyCode == KeyEvent.VK_LEFT){            keyCode = KeyEvent.VK_RIGHT;        }        //控制蛇改变方向移动        switch (keyCode) {            case KeyEvent.VK_UP:                orient = "U";                break;            case KeyEvent.VK_DOWN:                orient = "D";                break;            case KeyEvent.VK_LEFT:                orient = "L";                break;            case KeyEvent.VK_RIGHT:                orient = "R";                break;        }    }    //事件监听：需要通过固定事件来刷新，1秒10次（帧率）    @Override    public void actionPerformed(ActionEvent e) {        if (isStart && isFail == false) {//如果游戏是开始状态，就让蛇动起来            //吃食物            if (snakeX[0] == foodX && snakeY[0] == foodY) {                //长度+1                length++;                score += 10;                //再次让食物随机出现                foodX = 25 + 25 * random.nextInt(34);                foodY = 75 + 25 * random.nextInt(24);            }            //身体移动            for (int i = length - 1; i > 0; i--) {                snakeX[i] = snakeX[i - 1];                snakeY[i] = snakeY[i - 1];            }            //走向            switch (orient) {                case "R":                    snakeX[0] = snakeX[0] + 25;                    //边界判断                    if (snakeX[0] > 850) {                        snakeX[0] = 25;                    }                    break;                case "L":                    snakeX[0] = snakeX[0] - 25;                    //边界判断                    if (snakeX[0] < 25) {                        snakeX[0] = 850;                    }                    break;                case "U":                    snakeY[0] = snakeY[0] - 25;                    //边界判断                    if (snakeY[0] < 75) {                        snakeY[0] = 650;                    }                    break;                case "D":                    snakeY[0] = snakeY[0] + 25;                    //边界判断                    if (snakeY[0] > 650) {                        snakeY[0] = 75;                    }                    break;            }            //失败判断，撞到自己就GG            for (int i = 1 ; i < length; i++) {                if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]){                    isFail = true;                }            }            repaint();//刷新页面        }        timer.start();//定时器开启    }    @Override    public void keyTyped(KeyEvent e) {    }    @Override    public void keyReleased(KeyEvent e) {    }}

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