Java实现贪吃蛇游戏

package com.game.snake; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.util.Random; import javax.swing.ImageIcon; import javax.swing.JPanel; import javax.swing.Timer; public class View extends JPanel implements KeyListener,ActionListener{ //加载所有图片 ImageIcon up = new ImageIcon("u.png"); ImageIcon down = new ImageIcon("d.png"); ImageIcon left = new ImageIcon("l.png"); ImageIcon right = new ImageIcon("r.png"); ImageIcon body = new ImageIcon("body.png"); ImageIcon food = new ImageIcon("h.png"); //蛇的数据结构设计 int[] snakex = new int[750]; int[] snakey = new int[750]; int len = 3; String direction = "R";//R右L左U上D下 //食物生成 Random r = new Random(); int foodx = r.nextInt(34)*25+25; // 34个格子，一个格子25排像素，还有25像素空白 int foody = r.nextInt(24)*25+75; // 24个格子，一个格子25排像素，还有75像素空白 //游戏是否开始 boolean isStarted = false; //游戏是否失败 boolean isFaild = false; // 初始化蛇 public void initSnake(){ isStarted = false; isFaild = false; len = 3; direction = "R"; snakex[0] = 100; snakey[0] = 100; snakex[1] = 75; snakey[1] = 100; snakex[2] = 50; snakey[2] = 100; } public View() { this.setFocusable(true); initSnake(); //放置静态蛇； this.addKeyListener(this);//添加键盘监听接口 timer.start(); } //设置蛇移动速度 Timer timer = new Timer(150, this); public void paint(Graphics g){ //设置背景黑色 this.setBackground(Color.black); g.fillRect(25, 10, 850, 660); //画蛇头 if(direction.equals("R")){ right.paintIcon(this, g, snakex[0], snakey[0]); }else if(direction.equals("L")){ left.paintIcon(this, g, snakex[0], snakey[0]); }else if(direction.equals("U")){ up.paintIcon(this, g, snakex[0], snakey[0]); }else if(direction.equals("D")){ down.paintIcon(this, g, snakex[0], snakey[0]); } //画蛇身 for(int i=1;i<len;i++){ body.paintIcon(this, g, snakex[i],snakey[i]); } //画开始提示语 if(!isStarted){ g.setColor(Color.WHITE); g.setFont(new Font("Helvetica Neue",Font.BOLD,30)); g.drawString("按下空格键开始或暂停", 230, 350); } //画失败提示语 if (isFaild) { g.setColor(Color.WHITE); g.setFont(new Font("Helvetica Neue",Font.BOLD,30)); g.drawString("游戏结束,按下空格键开始", 230, 350); } //画食物 food.paintIcon(this, g, foodx, foody); } @Override public void keyTyped(KeyEvent e) { // TODO Auto-generated method stub } //监听按键 @Override public void keyPressed(KeyEvent e) { int keyCode = e.getKeyCode(); //实现空格暂停 继续 if(keyCode == KeyEvent.VK_SPACE){ if(isFaild){ initSnake(); } else{ isStarted = !isStarted; } // repaint(); }//实现转向 else if(keyCode == KeyEvent.VK_UP && !direction.equals("D")){ direction="U"; }else if(keyCode == KeyEvent.VK_DOWN && !direction.equals("U")){ direction="D"; }else if(keyCode == KeyEvent.VK_LEFT && !direction.equals("R")){ direction="L"; }else if(keyCode == KeyEvent.VK_RIGHT && !direction.equals("L")){ direction="R"; } } @Override public void keyReleased(KeyEvent e) { // TODO Auto-generated method stub } /* * 1.定个闹钟 * 2.蛇移动 * 3.重画一次蛇 */ @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub timer.start(); if(isStarted && !isFaild){ //移动身体 for(int i=len;i>0;i--){ snakex[i] = snakex[i-1]; snakey[i] = snakey[i-1]; } //头移动 if(direction.equals("R")){ //横坐标+25 snakex[0] = snakex[0]+25; if(snakex[0]>850) snakex[0] = 25; }else if(direction.equals("L")){ //横坐标-25 snakex[0] = snakex[0]-25; if(snakex[0]<25) snakex[0] = 850; }else if(direction.equals("U")){ //纵坐标-25 snakey[0] = snakey[0]-25; if(snakey[0]<75) snakey[0] = 650; }else if(direction.equals("D")){ //纵坐标+25 snakey[0] = snakey[0]+25; if(snakey[0]>650) snakey[0] = 75; } //吃食物 if(snakex[0] == foodx && snakey[0] == foody){ len++; foodx = r.nextInt(34)*25+25; foody = r.nextInt(24)*25+75; } //判断游戏失败 for(int i=1;i<len;i++){ if(snakex[0] == snakex[i] && snakey[0] == snakey[i]){ isFaild = true; } } } repaint(); } }