java實現貪吃蛇游戲代碼示例

import javax.swing.*;
 //主啟動類
 public class StartGame {
 public static void main(String[] args) {
 JFrame jFrame = new JFrame("貪吃蛇小游戲");
 jFrame.setBounds(10,10,900,720);
 jFrame.setResizable(false); //設置窗口大小不可變
 jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
 //面板
 jFrame.add(new GamePanel());
 jFrame.setVisible(true);
 }
}

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


public class Data {
 //頭部圖片
 public static URL headerURL = Data.class.getResource("statics/header.png");
 public static ImageIcon header = new ImageIcon(headerURL);
 //頭部上下左右
 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);
 //身體
 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);

}

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;

//游戲的面板
public class GamePanel extends JPanel implements KeyListener, ActionListener {
 //定義蛇的數據結構
 int length; //蛇的長度
 int[] snakeX = new int[600]; //蛇的x坐標 25*25
 int[] snakeY = new int[500]; //蛇的y坐標 25*25
 String fx;
 //食物
 int foodx;
 int foody;
 Random random = new Random();
 int score; //游戲分數
 //游戲當前的狀態
 boolean isStart = false;
 boolean isFail = false; 
 //定時器
 Timer timer = new Timer(100,this);//100毫秒刷新一次
 //構造方法
 public GamePanel() {
 init();//初始化
 this.setFocusable(true); //獲得焦點事件
 this.addKeyListener(this); //獲得鍵盤監聽事件
 timer.start(); //游戲一開始 定時器就啟動
 }

 //初始化方法
 public void init(){
 length = 3;
 //初始化開始的蛇，給蛇定位
 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
 //初始化食物數據
 foodx = 25 + 25*random.nextInt(34);
 foody = 75 + 25*random.nextInt(24);
 //初始化游戲分數
 score = 0;
 }


 //繪制面板
 @Override
 protected void paintComponent(Graphics g) {
 super.paintComponent(g);//清屏
 this.setBackground(Color.white);//設置面板背景色
 Data.header.paintIcon(this,g,25,11);//頭部
 g.fillRect(25,75,850,600);//默認的黑色游戲區域

 //繪制小蛇
 if (fx.equals("R")){
  Data.right.paintIcon(this,g,snakeX[0],snakeY[0]); //蛇頭初始化向右
 }else if (fx.equals("L")){
  Data.left.paintIcon(this,g,snakeX[0],snakeY[0]); //蛇頭初始化向左
 }else if (fx.equals("U")){
  Data.up.paintIcon(this,g,snakeX[0],snakeY[0]); //蛇頭初始化向上
 }else if (fx.equals("D")){
  Data.down.paintIcon(this,g,snakeX[0],snakeY[0]); //蛇頭初始化向下
 }
 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);
 //積分
 g.setColor(Color.white);
 g.setFont(new Font("微軟雅黑",Font.BOLD,18));
 g.drawString("長度 "+length,750,35);
 g.drawString("分數 "+score,750,50);
 //游戲狀態
 if (isStart == false){
  g.setColor(Color.white);
  g.setFont(new Font("微軟雅黑",Font.BOLD,40));//設置字體
  g.drawString("按下空格開始游戲",300,300);
 }
 //失敗判斷
 if (isFail){
  g.setColor(Color.red);
  g.setFont(new Font("微軟雅黑",Font.BOLD,40));//設置字體
  g.drawString("游戲失敗，按下空格重新開始",300,300);
 }
 }
 
 //鍵盤監聽事件
 @Override
 public void keyPressed(KeyEvent e) {
 int keyCode = e.getKeyCode(); //獲取按鍵
 if (keyCode == KeyEvent.VK_SPACE){
  if (isFail){
  //重新開始
  isFail=false;
  init();
  }else {
  isStart =! isStart; 
  }
  repaint();
 }

 //鍵盤控制小蛇移動
 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";
 }
 }
 //事件監聽
 @Override
 public void actionPerformed(ActionEvent e) {
 if (isStart && isFail ==false){//如果游戲是開始狀態，就讓小蛇動起來
  //移動
  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;
  //邊界判斷
  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;
  //再次隨機食物
  foodx = 25 + 25*random.nextInt(34);
  foody = 75 + 25*random.nextInt(24);
  }
  //失敗判定,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) {
 }
}