很多人都玩过贪吃蛇这个游戏，今天我们就来简单完成一个贪吃蛇的纯Java小项目。首先，贪吃蛇有以下几个要求：
未实现功能，蛇前进时，相反方向的键失效
获取静态资源图片路径，并转换为图片
public class Data {
//顶部的图片 URL :定位图片的地址
public static URL headerURL = Data.class.getResource("/statics/header.png");
//使路径下的资源变成一张图片
public static ImageIcon header = new ImageIcon(headerURL);
//头部
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 food1URL = Data.class.getResource("/statics/food1.png");
public static URL food2URL = Data.class.getResource("/statics/food2.png");
public static URL food3URL = Data.class.getResource("/statics/food3.png");
public static ImageIcon food1 = new ImageIcon(food1URL);
public static ImageIcon food2 = new ImageIcon(food2URL);
public static ImageIcon food3 = new ImageIcon(food3URL);
}
public class GamesPanel extends JPanel implements KeyListener, ActionListener {
//蛇的长度
int lenght;
//蛇的坐标X
int[] snakeX = new int[600];
//蛇的坐标Y
int[] snakeY = new int[500];
//方向 U：上 D：下 L：左 R：右
String fx;
//游戏是否开始
boolean isStart = false;
//定时器
Timer timer = new Timer(1000,this);
//定义一个食物
int food1X;int food1Y;
int food2X;int food2Y;
int food3X;int food3Y;
Random random = new Random();
//死亡判断
boolean isFail = false;
//积分系统
int score;
//构造器
public GamesPanel(){
init();
//获取键盘的监听事件
this.setFocusable(true);
this.addKeyListener(this);
//让时间动起来
timer.start();
}
//初始化
public void init(){
//蛇的长度
lenght = 3;
//蛇的头部
snakeX[0] = 100; snakeY[0] = 100;
//第一个身体坐标
snakeX[1] = 75; snakeY[1] = 100;
//第二个身体坐标
snakeX[2] = 50; snakeY[2] = 100;
//蛇头方向
fx = "R";
//随机生成食物
food1X = 25 + 25*random.nextInt(34);
food1Y = 75 + 25*random.nextInt(24);
food2X = 25 + 25*random.nextInt(34);
food2Y = 75 + 25*random.nextInt(24);
food3X = 25 + 25*random.nextInt(34);
food3Y = 75 + 25*random.nextInt(24);
//积分
score = 0;
}
/**
* 2、画板：画界面，画蛇
* Graphics ：画笔
*/
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g); //清屏
//设置背景颜色 bai色
this.setBackground(Color.WHITE);
//绘制头部的图片
Data.header.paintIcon(this,g,20,11);
//绘制游戏的区域
g.fillRect(25,65,840,600);
//画一条静态的小蛇
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]);
}
//蛇的身体长度通过length来控制
for (int i = 1;i < lenght;i++){
Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
}
//画积分
g.setColor(Color.WHITE);
g.setFont(new Font("微软雅黑",Font.BOLD,18));
g.drawString("长度："+lenght,750,35);
g.drawString("分数："+score,750,50);
//画食物
Data.food1.paintIcon(this,g,food1X,food1Y);
Data.food2.paintIcon(this,g,food2X,food2Y);
Data.food3.paintIcon(this,g,food3X,food3Y);
//游戏提示：是否开始
if (isStart == false){
//画一个文字，String
//设置画笔颜色
g.setColor(Color.WHITE);
//设置字体
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("按下空格开始游戏",300,300);
}
//失败提示
if (isFail){
//画一个文字，String
//设置画笔颜色
g.setColor(Color.RED);
//设置字体
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("游戏失败，按下空格重新开始游戏",200,300);
}
}
//3、接收键盘的输入：监听
@Override
public void keyPressed(KeyEvent e) {
//键盘按下，未释放
//获取按下的键盘是哪个键
int keyCode = e.getKeyCode();
if (keyCode == KeyEvent.VK_SPACE){//如果按下的是空格键
//游戏失败，再来一次
if (isFail){
isFail = false;
//重新初始化游戏
init();
}else {
//暂停游戏
isStart = !isStart;
}
//重新绘制界面 类似于 刷新界面
repaint();
}
//键盘控制走向
if (keyCode == KeyEvent.VK_LEFT){
fx = "L";
}else if (keyCode == KeyEvent.VK_UP){
fx = "U";
}else if (keyCode == KeyEvent.VK_RIGHT){
fx = "R";
}else if (keyCode == KeyEvent.VK_DOWN){
fx = "D";
}
}
//4、定时器：监听时间 帧
@Override
public void actionPerformed(ActionEvent e) {
//执行定时操作
//如果游戏处于开始状态，并且游戏没有结束
if (isStart && isFail ==false){
//右移
//身体移动 除了头部，身体都向前移动
for (int i = lenght -1;i > 0;i--){
snakeX[i] = snakeX[i-1];
snakeY[i] = snakeY[i-1];
}
//通过控制方向让头部移动
if (fx.equals("R")){
//头部移动
snakeX[0] += 25;
//边界判断
if (snakeX[0] > 850){
isFail = true;
}
}else if (fx.equals("L")){
//头部移动
snakeX[0] -= 25;
//边界判断
if (snakeX[0] < 25){
isFail = true;
}
}else if (fx.equals("U")){
//头部移动
snakeY[0] -= 25;
//边界判断
if (snakeY[0] <75){
isFail = true;
}
}else if (fx.equals("D")){
//头部移动
snakeY[0] += 25;
//边界判断
if (snakeY[0] > 650){
isFail = true;
}
}
//如果小蛇的头与食物坐标重合
if (snakeX[0] == food1X && snakeY[0] == food1Y){
//长度+1
lenght++;
score += 1;
//重新生成食物
food1X = 25 + 25*random.nextInt(34);
food1Y = 75 + 25*random.nextInt(24);
}
if (snakeX[0] == food2X && snakeY[0] == food2Y){
//长度+1
lenght++;
score += 2;
//重新生成食物
food2X = 25 + 25*random.nextInt(34);
food2Y = 75 + 25*random.nextInt(24);
}
if (snakeX[0] == food3X && snakeY[0] == food3Y){
//长度+1
lenght++;
score += 3;
//重新生成食物
food3X = 25 + 25*random.nextInt(34);
food3Y = 75 + 25*random.nextInt(24);
}
if (score <= 10){
timer.setDelay(1000);
}else if (score > 10 && score <= 100){
timer.setDelay(500);
}else if (score > 100 && score <= 10000){
timer.setDelay(100);
}else if (score > 10000){
timer.setDelay(10);
}
//结束判断
for (int i = 1;i < lenght;i++){
if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]){
isFail = true;
}
}
//刷新界面
repaint();
}
//让时间动起来
timer.start();
}
@Override
public void keyTyped(KeyEvent e) {
//键盘按下，弹起 : 敲击
}
@Override
public void keyReleased(KeyEvent e) {
//释放某个键
}
}
public class StartGames {
public static void main(String[] args) {
//1、绘制一个静态页面 JFrame
JFrame frame = new JFrame("贪吃蛇小游戏");
//设置界面大小
frame.setBounds(10,10,900,720);
//设置窗口大小不可以改变
frame.setResizable(false);
//设置关闭事件，允许游戏可以关闭
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//添加面板
frame.add(new GamesPanel());
//让窗口可以展现出来
frame.setVisible(true);
}
}
原文：https://www.cnblogs.com/tenton/p/13908083.html