一．前言
某日，看见隔壁家的小朋友在玩一款网络爆款贪吃蛇游戏，感觉很好玩。自己刚好正在学习JAVA编程，也想实现一个类似功能的游戏Demo练手，在网上查看了不少源码案例，全都是很古老的方块式贪吃蛇游戏案例，没有想要的实现，因此自己动手实现一个JAVA版的贪吃蛇游戏。
我在这个Dome完成之后重写了这个游戏的Android版，并重新更名为《蛇王传说》。也欢迎大家下载试玩。游戏下载地址：蒲公英 - 用户登录
我的另一篇博客有Androd版本的游戏介绍：蛇王传说1.0Android版发布_hawkol的专栏-CSDN博客/hawkol/article/details/90608813
二、实现效果
1.启动界面 蛇头会左右摆动，动态效果
2、游戏主界面 地图上有不同的食物，用键盘控制蛇在地图上行走，每吃掉一个食物，蛇会自动生长一节
三、按键功能说明 左右键蛇转向，上键蛇加速行走。
四、美工准备
因自己不会美工，很多图都是从网上找的，然后用photoshop抠图，按自己的设计思路，做成以下样式。做片做的比较丑，就不放原图了。
1、images 文件夹
2、foolds文件夹
3、snake文件夹
4、在s0,s1,s2,s3,s4文件夹分别放以下5张图，可以做成不同颜色和样式（也就是蛇的皮肤）
五、打开Eclipse新建HawkRetroSnaker 项目，目录文件结构如下图：
从目录结构可以看出，此游戏有5个JAVA类，分别是
Foods.java (食物），
Snake.java (蛇），
SnakePlayer.java (游戏主程），
Tools.java （工具类），
UIGameStart.java (启动时的Ui).
六、游戏代码：关键代码地方都有注释，我就不多啰嗦了，代码写的比较烂，只是为了实现功能，有很多地方可以优化，大家也可提出自己的见解。
1.Foods.java
package com.hawkonline.retorsnaker;import java.awt.Color;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import javax.imageio.ImageIO;public class Foods {private int imgID;//食物图片D 以foodsX private int drawX;// 图块显示中心的X位置private int drawY;// 图块显示中心的Y位置private int generateEnergy;//产生能量private int offsetX;// 图块块显示的X位置偏移值-自动计算private int offsetY;// 图块块显示的X位置偏移值-自动计算private BufferedImage imgFoods;//public Foods(int imgID, int drawX, int drawY, int generateEnergy) {super();this.imgID = imgID;this.drawX = drawX;this.drawY = drawY;this.generateEnergy = generateEnergy;//加载食物图片try {imgFoods= ImageIO.read(new FileInputStream("images\\foods\\foods"+imgID+".png"));} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}this.offsetX = imgFoods.getWidth()/2;this.offsetY = imgFoods.getHeight()/2;}//画食物public void drawFoods(Graphics cg,int x,int y ){cg.drawImage(imgFoods, drawX-offsetX+x, drawY-offsetY+y, null);cg.setColor(Color.WHITE);//参照线-------------------cg.fillRect(drawX-1+x, drawY-1+y, 2, 2);}public Foods() {super();}public int getImgID() {return imgID;}public void setImgID(int imgID) {this.imgID = imgID;}public int getDrawX() {return drawX;}public void setDrawX(int drawX) {this.drawX = drawX;}public int getDrawY() {return drawY;}public void setDrawY(int drawY) {this.drawY = drawY;}public int getGenerateEnergy() {return generateEnergy;}public void setGenerateEnergy(int generateEnergy) {this.generateEnergy = generateEnergy;}public int getOffsetX() {return offsetX;}public void setOffsetX(int offsetX) {this.offsetX = offsetX;}public int getOffsetY() {return offsetY;}public void setOffsetY(int offsetY) {this.offsetY = offsetY;}}
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2.Snake.java
package com.hawkonline.retorsnaker;import java.awt.Color;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.util.Arrays;import java.util.Random;import javax.imageio.ImageIO;public class Snake {private Random rand = new Random();private int to=0;//自动移动模式标记蛇移动的方向，1左，2右// 蛇图片相关显示属性private int step;// 步长private int offsetX;// 图块块显示的X位置偏移值-自动计算private int offsetY;// 图块块显示的X位置偏移值-自动计算private BufferedImage imgSnakeHead;// 蛇头图片private BufferedImage imgSnakeBody1;// 蛇身体奇数图片private BufferedImage imgSnakeBody2;// 蛇身体偶数图片private BufferedImage imgSnakeTait1;// 蛇尾巴图片private BufferedImage imgSnakeTait2;// 蛇尾巴图片private BufferedImage imgRotate;// 旋转后的图片// 蛇的属值private int energy;// 吃豆得到的能量private int snakeLength;// 蛇的长度--默认3节，根椐能量获得的多少自动生长// 蛇头private int snakeHeadX;// 蛇头X坐标private int snakeHeadY;// 蛇头Y坐标private int snakeHeadDirection;// 蛇头移动的方向private int snakeDisplayStyle;// 蛇显示风格private boolean snakeIsDeath;//蛇死亡标记 True-生存， false=死亡// 蛇身体private int[] bodyX;// 蛇身体X坐标private int[] bodyY;// 蛇身体Y坐标private int[] bodyDirection;// 蛇身体方向// 构造函数public Snake(int snakeHeadX, int snakeHeadY, int snakeHeadDirection, int snakeDisplayStyle) {super();this.snakeHeadX = snakeHeadX;this.snakeHeadY = snakeHeadY;this.snakeHeadDirection = snakeHeadDirection;this.snakeDisplayStyle = snakeDisplayStyle;this.snakeIsDeath = true;//蛇死亡标记 True-生存， false=死亡snakeLength =6;// 加载图片try {imgSnakeHead = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\head.png"));imgSnakeBody1 = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\body1.png"));imgSnakeBody2 = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\body2.png"));imgSnakeTait1 = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\tait1.png"));imgSnakeTait2 = ImageIO.read(new FileInputStream("images\\snake\\s" + snakeDisplayStyle + "\\tait2.png"));} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}this.offsetX =imgSnakeHead.getWidth()/2;this.offsetY =imgSnakeHead.getHeight()/2;this.step = 8;// 蛇身体-构造时为3节bodyX = new int[snakeLength];bodyY = new int[snakeLength];bodyDirection = new int[snakeLength];for (int i = 0; i < snakeLength; i++) {bodyX[i] = snakeHeadX - (i + 1) * step;bodyY[i] = snakeHeadY;bodyDirection[i] = 0;}}// 画蛇public void snakeShow(Graphics cg,int x,int y) {// 画蛇身体for (int i = snakeLength - 1; i >= 0; i--) {if (i == snakeLength - 1) {// 画蛇尾if ((i % 2 == 0)) {imgRotate = Tools.rotateImage(imgSnakeTait1, bodyDirection[i]);} else {imgRotate = Tools.rotateImage(imgSnakeTait2, bodyDirection[i]);}} else {// 画蛇身体if ((i % 2) == 0) {imgRotate = Tools.rotateImage(imgSnakeBody1, bodyDirection[i]);} else {imgRotate = Tools.rotateImage(imgSnakeBody2, bodyDirection[i]);}}cg.drawImage(imgRotate, bodyX[i] - offsetX+x, bodyY[i] - offsetY+y,null);// 参照线-------------------cg.setColor(Color.WHITE);cg.fillRect(bodyX[i] - 1+x, bodyY[i] - 1+y, 2, 2);}// 画蛇头imgRotate = Tools.rotateImage(imgSnakeHead, snakeHeadDirection);cg.drawImage(imgRotate, snakeHeadX - offsetX+x, snakeHeadY - offsetY+y,null);// 参照线-------------------cg.setColor(Color.WHITE);cg.fillRect(snakeHeadX - 1+x, snakeHeadY - 1+y, 2, 2);cg.setColor(Color.BLUE);int sX = (int) (snakeHeadX + 150 * Math.cos(snakeHeadDirection * 3.14 / 180));int sY = (int) (snakeHeadY + 150 * Math.sin(snakeHeadDirection * 3.14 / 180));cg.fillRect(sX - 1+x, sY - 1+y, 2, 2);sX = (int) (snakeHeadX + 100 * Math.cos((snakeHeadDirection+45) * 3.14 / 180));sY = (int) (snakeHeadY + 100 * Math.sin((snakeHeadDirection+45) * 3.14 / 180));cg.fillRect(sX - 1+x, sY - 1+y, 2, 2);sX = (int) (snakeHeadX + 100 * Math.cos((snakeHeadDirection-45) * 3.14 / 180));sY = (int) (snakeHeadY + 100 * Math.sin((snakeHeadDirection-45) * 3.14 / 180));cg.fillRect(sX - 1+x, sY - 1+y, 2, 2);// 参照线-------------------cg.setColor(Color.WHITE);cg.fillRect(snakeHeadX - 1+x, snakeHeadY - 1+y, 2, 2);}public void snakeAutoMove(){// 蛇智能移动方案3//蛇下一步的位置int sX = (int) (snakeHeadX + 150 * Math.cos(snakeHeadDirection * 3.14 / 180));int sY = (int) (snakeHeadY + 150 * Math.sin(snakeHeadDirection * 3.14 / 180));//蛇死亡了if(sX<=20||sX>=(Tools.MAP_X-20)||sY<=20||sY>=(Tools.MAP_Y-20)){boolean isL=false,isR=false;//看下左边45度会不会死sX = (int) (snakeHeadX + 100 * Math.cos((snakeHeadDirection+45) * 3.14 / 180));sY = (int) (snakeHeadY + 100 * Math.sin((snakeHeadDirection+45) * 3.14 / 180));if(sX<=20||sX>=(Tools.MAP_X-20)||sY<=20||sY>=(Tools.MAP_Y-20)){isL=true;}//看下左边45度会不会死sX = (int) (snakeHeadX + 100 * Math.cos((snakeHeadDirection-45) * 3.14 / 180));sY = (int) (snakeHeadY + 100 * Math.sin((snakeHeadDirection-45) * 3.14 / 180));if(sX<=20||sX>=(Tools.MAP_X-15)||sY<=20||sY>=(Tools.MAP_Y-15)){isR=true;}//左右死if((isL)&&(isL)){if(rand.nextInt(1)==1){snakeHeadDirection+=(rand.nextInt(5)+20);//增大旋转角度to=1;}else{snakeHeadDirection-=(rand.nextInt(5)+20);//增大旋转角度to=2;}}else if(isL){snakeHeadDirection-=(rand.nextInt(5)+5);//增大旋转角度to=2;}else{snakeHeadDirection+=(rand.nextInt(5)+5);//增大旋转角度to=1;}}else{if(rand.nextInt(rand.nextInt(20)+10)==1){to=rand.nextInt(3);}if (to==1) snakeHeadDirection+=(rand.nextInt(5)+2);if (to==2) snakeHeadDirection-=(rand.nextInt(5)+2);}snakeMove();}// 蛇移动-按照设置的方向前行public void snakeMove() {if (snakeIsDeath) {// 蛇的后一节的值继承前一节的值for (int i = snakeLength - 1; i > 0; i--) {bodyX[i] = bodyX[i - 1];bodyY[i] = bodyY[i - 1];bodyDirection[i] = bodyDirection[i - 1];}// 第一节的值继承蛇头的值bodyX[0] = snakeHeadX;bodyY[0] = snakeHeadY;bodyDirection[0] = snakeHeadDirection;snakeHeadX = (int) (snakeHeadX + step * Math.cos(snakeHeadDirection * 3.14 / 180));snakeHeadY = (int) (snakeHeadY + step * Math.sin(snakeHeadDirection * 3.14 / 180));}}// 蛇生长--数组自动扩容1节public void snakGrow() {snakeLength = snakeLength + 1;if (snakeLength > bodyX.length) {bodyX = Arrays.copyOf(bodyX, snakeLength);bodyY = Arrays.copyOf(bodyY, snakeLength);bodyDirection = Arrays.copyOf(bodyDirection, snakeLength);}}// 蛇死亡public void snakeDeath() {this.snakeIsDeath = false;//蛇死亡标记 True-生存， false=死亡// 随机数--产生蛇块断裂Random rand = new Random();for (int i = 0; i < snakeLength; i++) {bodyX[i] = bodyX[i] + rand.nextInt(step * 2) - rand.nextInt(step * 2);bodyY[i] = bodyY[i] + rand.nextInt(step * 2) - rand.nextInt(step * 2);bodyDirection[i] = bodyDirection[i] + rand.nextInt(360);}//snakeHeadX = snakeHeadX + rand.nextInt(step) - rand.nextInt(step);//snakeHeadY = snakeHeadY + rand.nextInt(step) - rand.nextInt(step);snakeHeadX = (int) (snakeHeadX + step * Math.cos(snakeHeadDirection * 3.14 / 180));snakeHeadY = (int) (snakeHeadY + step * Math.sin(snakeHeadDirection * 3.14 / 180));}// get---- set-----public int getSnakeHeadDirection() {return snakeHeadDirection;}public void setSnakeHeadDirection(int snakeHeadDirection) {this.snakeHeadDirection = snakeHeadDirection;}public int getSnakeHeadX() {return snakeHeadX;}public void setSnakeHeadX(int snakeHeadX) {this.snakeHeadX = snakeHeadX;}public int getSnakeHeadY() {return snakeHeadY;}public void setSnakeHeadY(int snakeHeadY) {this.snakeHeadY = snakeHeadY;}public boolean getSnakIsDeath() {return snakeIsDeath;}public boolean isSnakeIsDeath() {return snakeIsDeath;}public void setSnakeIsDeath(boolean snakeIsDeath) {this.snakeIsDeath = snakeIsDeath;}public int getEnergy() {return energy;}public void setEnergy(int energy) {this.energy = energy;if((energy-5)>=0){//每获取5点能量，蛇生长一节(12-5)>=0this.snakGrow();//蛇生长this.energy=this.energy-5;}}public int getSnakeLength() {return snakeLength;}public void setSnakeLength(int snakeLength) {this.snakeLength = snakeLength;}public int getSnakeDisplayStyle() {return snakeDisplayStyle;}public void setSnakeDisplayStyle(int snakeDisplayStyle) {this.snakeDisplayStyle = snakeDisplayStyle;}}
3.SnakePlayer.java
package com.hawkonline.retorsnaker;import java.awt.Color;import java.awt.Cursor;import java.awt.Font;import java.awt.Graphics;import java.awt.event.KeyEvent;import java.awt.event.KeyListener;import java.awt.image.BufferedImage;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.util.Random;import javax.imageio.ImageIO;import javax.swing.ImageIcon;import javax.swing.JFrame;public class SnakePlayer extends JFrame implements Runnable, KeyListener{Random rand = new Random();private int runGame=0;//UIprivate UIGameStart uiGameStart=null;private int inputSleep=80;//线程执行间隔时长private int drawMapX,drawMapY;private static BufferedImage bfMap= new BufferedImage(Tools.MAP_X, Tools.MAP_Y, BufferedImage.TYPE_3BYTE_BGR); // 创建一张1920＊1080的地图源图private static BufferedImage bfGameMap = new BufferedImage(Tools.SCREEN_X, Tools.SCREEN_Y, BufferedImage.TYPE_3BYTE_BGR); // 创建一张1920＊1080的缓冲图片private static Graphics bfGameMapGraphics =bfGameMap.getGraphics();// 获取缓冲图片的画笔private BufferedImage imgDisplayInformation=null;private BufferedImage imeGameOver=null;private Foods []foods=null;//小圆点食物private Snake snake=null;//蛇//private Snake enemy=null;public SnakePlayer() {this.setTitle(Tools.GameName);// 设置框架的大小this.setSize(Tools.SCREEN_X, Tools.SCREEN_Y);// 设置框架大小可以改变this.setResizable(false);//设置窗体居中显示this.setLocationRelativeTo(null);// 设置点击关闭按钮 关闭界面this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置GUI的窗口图标ImageIcon snakeIcon = new ImageIcon("images\\snakeIcon.png");this.setIconImage(snakeIcon.getImage());// 允许显示游戏界面this.setVisible(true); // 添加键盘监听器 this.addKeyListener(this);// 添加鼠标监听器 //鼠标样式this.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));//创建UI界面uiGameStart=new UIGameStart();loadGameResources();//加载游戏资源bfMapDraw();//画背地图，以后不用多次画了setFoods();setSnake();Thread thread = new Thread(this); // 创建线程 thread.start(); // 启动线程 }//加载游戏资源private void loadGameResources() {try {imgDisplayInformation = ImageIO.read(new FileInputStream("images\\DisplayInformation.png"));imeGameOver = ImageIO.read(new FileInputStream("images\\GameOver.png"));} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}//设置蛇private void setSnake() {snake=new Snake(Tools.MAP_X/2, Tools.MAP_Y/2, 0,rand.nextInt(Tools.SNAKE_STYLE_SUM));//int sx=rand.nextInt(Tools.MAP_X-40)+20;//int sy=rand.nextInt(Tools.MAP_Y-40)+20;//int sd=rand.nextInt(360);//int ss=rand.nextInt(Tools.SNAKE_STYLE_SUM);////enemy=new Snake(sx, sy, sd, ss);}// 设置食物private void setFoods() {foods=new Foods[Tools.FOODS_SUM];for(int i=0;i<Tools.FOODS_SUM;i++){int imgID=rand.nextInt(Tools.FOODS_TYPE_SUM);int drawX=rand.nextInt(Tools.MAP_X-40)+20;int drawY=rand.nextInt(Tools.MAP_Y-40)+20;//-------------可设计从XML文件读入int generateEnergy;if (imgID<7){generateEnergy=1;}else {generateEnergy=5;}foods[i]=new Foods(imgID, drawX, drawY, generateEnergy);}}// 设置游戏地图private void bfMapDraw() {Graphics bfMapGraphics =bfMap.getGraphics();// 获取缓冲图片的画笔bfMapGraphics.setColor(Color.BLACK); // 设置map外框为黑色bfMapGraphics.fillRect(0, 0, Tools.MAP_X, Tools.MAP_Y);bfMapGraphics.setColor(new Color(90, 90, 90)); // 设置map墙为黑色bfMapGraphics.fillRect(10, 10, Tools.MAP_X - 20, Tools.MAP_Y - 20);bfMapGraphics.setColor(new Color(208, 208, 224)); // 设置map背景色bfMapGraphics.fillRect(20, 20, Tools.MAP_X - 40, Tools.MAP_Y - 40);// 画map格bfMapGraphics.setColor(new Color(241, 241, 240));for (int i = 20; i < Tools.MAP_Y; i += 20) {bfMapGraphics.drawLine(0 + 12, i, Tools.MAP_X -12, i);}for (int j = 20; j < Tools.MAP_X; j += 20) {bfMapGraphics.drawLine(j, 0 + 12, j, Tools.MAP_Y - 12);}}public void reDrawGame(){//得到画地图的偏移值drawMapX=-snake.getSnakeHeadX()+Tools.SCREEN_X/2;drawMapY=-snake.getSnakeHeadY()+Tools.SCREEN_Y/2;//画地图背景bfGameMapGraphics.setColor(Color.red);bfGameMapGraphics.fillRect(0, 0, Tools.SCREEN_X, Tools.SCREEN_Y);bfGameMapGraphics.drawImage(bfMap, drawMapX, drawMapY, null);//显示第一层背景地图for(int i=0;i<Tools.FOODS_SUM;i++){int distance = (int) Math.sqrt(Math.abs((foods[i].getDrawX() - snake.getSnakeHeadX())*(foods[i].getDrawX() - snake.getSnakeHeadX()))+Math.abs((foods[i].getDrawY() - snake.getSnakeHeadY())*(foods[i].getDrawY() - snake.getSnakeHeadY())));if (distance<25){//如果贪吃蛇离食物有20，测吃掉食物snake.setEnergy(snake.getEnergy()+foods[i].getGenerateEnergy());//能量加//产生新的食物foods[i].setDrawX(rand.nextInt(Tools.MAP_X-40)+20);foods[i].setDrawY(rand.nextInt(Tools.MAP_Y-40)+20);}foods[i].drawFoods(bfGameMapGraphics, drawMapX,drawMapY);}//===============================================if (snake.getSnakIsDeath()){//如果蛇在活着//snake.snakeMove();//蛇移动snake.snakeAutoMove();//判断蛇是否撞墙if(snake.getSnakeHeadX()<=20||snake.getSnakeHeadX()>=(Tools.MAP_X-20)||snake.getSnakeHeadY()<=20||snake.getSnakeHeadY()>=(Tools.MAP_Y-20)){snake.snakeDeath();//蛇死亡了runGame=2;//游戏结束}}snake.snakeShow(bfGameMapGraphics,drawMapX,drawMapY);}public void paint(Graphics gr) {switch (runGame){case 0:uiGameStart.drawUIGameStart(bfGameMapGraphics);gr.drawImage(bfGameMap,0,0, null); // 将缓冲mapbreak;case 1:reDrawGame();//显示得分showDisplayInformation();gr.drawImage(bfGameMap,0,0, null); // 将缓冲mapbreak;case 2:reDrawGame();showDisplayInformation();bfGameMapGraphics.drawImage(imeGameOver,250,100, null);gr.drawImage(bfGameMap,0,0, null); // 将缓冲mapbreak;default:break;}} //显示得分private void showDisplayInformation() {bfGameMapGraphics.drawImage(imgDisplayInformation,300,30, null); bfGameMapGraphics.setColor(Color.RED);bfGameMapGraphics.setFont(new Font("arial",Font.BOLD, 30));bfGameMapGraphics.drawString(snake.getSnakeLength()+"", 460, 66);bfGameMapGraphics.drawString(snake.getEnergy()+"", 680, 66);}/** * 线程执行方法 */ public void run() { try { while (true) { this.repaint(); Thread.sleep(inputSleep); } } catch (InterruptedException e) { e.printStackTrace(); } } /** * 按下时调用 */ public void keyPressed(KeyEvent e) { int keyCode = e.getKeyCode();//游戏刚启动时，按任意键开始游戏 if (runGame==0){runGame=1;}if (keyCode ==KeyEvent.VK_LEFT&&runGame==1) { // 左按键 snake.setSnakeHeadDirection(snake.getSnakeHeadDirection()-5);//蛇左转} if (keyCode == KeyEvent.VK_RIGHT&&runGame==1) { // 右按键 snake.setSnakeHeadDirection(snake.getSnakeHeadDirection()+5);//蛇右转} if(keyCode==KeyEvent.VK_UP&&runGame==1){//加速inputSleep=20;}if(keyCode==KeyEvent.VK_L&&runGame==2){//复活snake.setSnakeHeadX(Tools.MAP_X/2);snake.setSnakeHeadY(Tools.MAP_Y/2);runGame=1;snake.setSnakeIsDeath(true);}if(keyCode==KeyEvent.VK_Y&&runGame==2){//重新开始snake.setSnakeHeadX(Tools.MAP_X/2);snake.setSnakeHeadY(Tools.MAP_Y/2);snake.setSnakeLength(3);snake.setEnergy(0);runGame=1;snake.setSnakeIsDeath(true);}} /** * 释放按键时调用 */ public void keyReleased(KeyEvent e) { int keyCode = e.getKeyCode(); if(keyCode==KeyEvent.VK_UP){inputSleep=80;}} /** * 不解释 */ public void keyTyped(KeyEvent e) { } public static void main(String[] args) { new SnakePlayer(); }}
4、Tools.java
package com.hawkonline.retorsnaker;import java.awt.Graphics2D;import java.awt.RenderingHints;import java.awt.image.BufferedImage;public class Tools {public static final int MAP_X = 1920;public static final int MAP_Y = 1080;public static final int SCREEN_X = 800;public static final int SCREEN_Y = 600;public static final String GameName = "美卡贪吃蛇1.0.0";public final static int FOODS_TYPE_SUM = 19;// 食物种类public final static int FOODS_SUM = 50;// 小圆食物总数public final static int SNAKE_STYLE_SUM = 6;// 蛇皮肤总数public final static int SNAKE__SUM=10;//蛇的数量/*** 旋转图片为指定角度* * @param bufferedimage* 目标图像* @param degree* 旋转角度* @return*/public final static BufferedImage rotateImage(final BufferedImage bufferedimage, final int degree) {int w = bufferedimage.getWidth();// 得到图片宽度。int h = bufferedimage.getHeight();// 得到图片高度。int type = bufferedimage.getColorModel().getTransparency();// 得到图片透明度。BufferedImage img;// 空的图片。Graphics2D graphics2d;// 空的画笔。(graphics2d = (img = new BufferedImage(w, h, type)).createGraphics()).setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2);// 旋转，degree是整型，度数，比如垂直90度。graphics2d.drawImage(bufferedimage, 0, 0, null);// 从bufferedimagecopy图片至img，0,0是img的坐标。graphics2d.dispose();return img;// 返回复制好的图片，原图片依然没有变，没有旋转，下次还可以使用。}}
5、UIGameStart.java
package com.hawkonline.retorsnaker;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import javax.imageio.ImageIO;public class UIGameStart {private BufferedImage gameStart=null;private BufferedImage snakeImage=null;private BufferedImage snakeTxt=null;private BufferedImage imgRotate;// 旋转后的图片private int retate=0;private boolean left=true;public UIGameStart() {try {gameStart = ImageIO.read(new FileInputStream("images\\gameStart.png"));snakeImage = ImageIO.read(new FileInputStream("images\\snakeImage.png"));snakeTxt = ImageIO.read(new FileInputStream("images\\snakeTxt.png"));} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void drawUIGameStart(Graphics cg){cg.setColor(Color.BLACK);cg.fillRect(0, 0, Tools.SCREEN_X, Tools.SCREEN_Y);//画背景cg.drawImage(gameStart,0, 0, Tools.SCREEN_X, Tools.SCREEN_Y,null);//蛇头动画参数if (left){retate+=2;if (retate==20) left=false;}else{retate-=2;if (retate==-20) left=true;}imgRotate = Tools.rotateImage(snakeImage, retate);//居中显示cg.drawImage(imgRotate, (Tools.SCREEN_X-snakeImage.getWidth())/2, (Tools.SCREEN_Y-snakeImage.getHeight())/2, null);cg.drawImage(snakeTxt, (Tools.SCREEN_X-snakeTxt.getWidth())/2, (Tools.SCREEN_Y-snakeTxt.getHeight())/2, null);cg.setColor(Color.RED);cg.setFont(new Font("arial",Font.BOLD, 30));}}
直接运行。完工！！
snake.snakeAutoMove()是自动行走模式，实现了简单的AI智能,经测试蛇在地图上可以长时间不撞墙死掉。
如果改为snake.snakeMove()是手动操控模式。
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