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) {
}
}以上是“Java如何实现简易GUI贪吃蛇小游戏”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注亿速云行业资讯频道！
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