GUI编程实现贪吃蛇小游戏
（推荐教程：java课程）
1、编写主方法实现启动类
2、准备好素材图片，编写数据类
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3、代码主体部分：在panel面板上实现游戏初始化，键盘和事件的监听等功能
4、代码运行效果图
5、GitHub源码链接
1、编写主方法实现启动类
import javax.swing.*;
//主启动类
public class StartGame {
public static void main(String[] args) {
JFrame jFrame = new JFrame("贪吃蛇小游戏");
jFrame.setBounds(10,10,900,720);
jFrame.setResizable(false); //设置窗口大小不可变
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
//面板
jFrame.add(new GamePanel());
jFrame.setVisible(true);
}
}2、准备好素材图片，编写数据类
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import javax.swing.*;
import java.net.URL;
public class Data {
//头部图片
public static URL headerURL = Data.class.getResource("statics/header.png");
public static ImageIcon header = new ImageIcon(headerURL);
//头部上下左右
public static URL upURL = Data.class.getResource("statics/up.png");
public static URL downURL = Data.class.getResource("statics/down.png");
public static URL leftURL = Data.class.getResource("statics/left.png");
public static URL rightURL = Data.class.getResource("statics/right.png");
public static ImageIcon up = new ImageIcon(upURL);
public static ImageIcon down = new ImageIcon(downURL);
public static ImageIcon left = new ImageIcon(leftURL);
public static ImageIcon right = new ImageIcon(rightURL);
//身体
public static URL bodyURL = Data.class.getResource("statics/body.png");
public static ImageIcon body = new ImageIcon(bodyURL);
//食物
public static URL foodURL = Data.class.getResource("statics/food.png");
public static ImageIcon food = new ImageIcon(foodURL);
}3、代码主体部分：在panel面板上实现游戏初始化，键盘和事件的监听等功能
package com.abc.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;
//游戏的面板
public class GamePanel extends JPanel implements KeyListener, ActionListener {
//定义蛇的数据结构
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 fx;
//食物
int foodx;
int foody;
Random random = new Random();
int score; //游戏分数
//游戏当前的状态
boolean isStart = false;
boolean isFail = false;
//定时器
Timer timer = new Timer(100,this);//100毫秒刷新一次
//构造方法
public GamePanel() {
init();//初始化
this.setFocusable(true); //获得焦点事件
this.addKeyListener(this); //获得键盘监听事件
timer.start(); //游戏一开始 定时器就启动
}
//初始化方法
public void init(){
length = 3;
//初始化开始的蛇，给蛇定位
snakeX[0] = 100;snakeY[0] = 100;
snakeX[1] = 75;snakeY[1] = 100;
snakeX[2] = 50;snakeY[2] = 100;
fx = "R"; //初始方向向右
//初始化食物数据
foodx = 25 + 25*random.nextInt(34);
foody = 75 + 25*random.nextInt(24);
//初始化游戏分数
score = 0;
}
//绘制面板
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);//清屏
this.setBackground(Color.white);//设置面板背景色
Data.header.paintIcon(this,g,25,11);//头部
g.fillRect(25,75,850,600);//默认的黑色游戏区域
//绘制小蛇
if (fx.equals("R")){
Data.right.paintIcon(this,g,snakeX[0],snakeY[0]); //蛇头初始化向右
}else if (fx.equals("L")){
Data.left.paintIcon(this,g,snakeX[0],snakeY[0]); //蛇头初始化向左
}else if (fx.equals("U")){
Data.up.paintIcon(this,g,snakeX[0],snakeY[0]); //蛇头初始化向上
}else if (fx.equals("D")){
Data.down.paintIcon(this,g,snakeX[0],snakeY[0]); //蛇头初始化向下
}
for (int i = 1; i < length; i++) {
Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
}
//食物
Data.food.paintIcon(this,g,foodx,foody);
//积分
g.setColor(Color.white);
g.setFont(new Font("微软雅黑",Font.BOLD,18));
g.drawString("长度 "+length,750,35);
g.drawString("分数 "+score,750,50);
//游戏状态
if (isStart == false){
g.setColor(Color.white);
g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
g.drawString("按下空格开始游戏",300,300);
}
//失败判断
if (isFail){
g.setColor(Color.red);
g.setFont(new Font("微软雅黑",Font.BOLD,40));//设置字体
g.drawString("游戏失败，按下空格重新开始",300,300);
}
}
//键盘监听事件
@Override
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode(); //获取按键
if (keyCode == KeyEvent.VK_SPACE){
if (isFail){
//重新开始
isFail=false;
init();
}else {
isStart =! isStart;
}
repaint();
}
//键盘控制小蛇移动
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";
}
}
//事件监听
@Override
public void actionPerformed(ActionEvent e) {
if (isStart && isFail ==false){//如果游戏是开始状态，就让小蛇动起来
//移动
for (int i = length-1; i > 0 ; i--) {
snakeX[i] = snakeX[i-1];
snakeY[i] = snakeY[i-1];
}
//走向
if (fx.equals("R")){
snakeX[0] = snakeX[0]+25;
//边界判断
if (snakeX[0]>850){
snakeX[0]=25;
}
}else if (fx.equals("L")){
snakeX[0] = snakeX[0]-25;
if (snakeX[0]<25){
snakeX[0]=850;
}
}else if (fx.equals("U")){
snakeY[0] = snakeY[0]-25;
if (snakeY[0]<75){
snakeY[0]=650;
}
}else if (fx.equals("D")){
snakeY[0] = snakeY[0]+25;
if (snakeY[0]>650){
snakeY[0]=75;
}
}
//吃食物
if (snakeX[0] == foodx && snakeY[0] == foody){
length++;
score = score + 10;
//再次随机食物
foodx = 25 + 25*random.nextInt(34);
foody = 75 + 25*random.nextInt(24);
}
//失败判定,撞到自己
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 keyReleased(KeyEvent e) {
}
}4、代码运行效果图
初始化界面:
游戏中界面：
游戏结束界面：
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