前不久，跟着博主学习，做了一个小游戏——贪吃蛇，尽管是用java的gui做的，然而我集体感觉趣味是最好的老师，只管当初社会上曾经淘汰了gui，然而我心愿咱们学习可能将趣味投入到学习当中，趣味是最好的老师。
StartGame.java
package com.xiaoyu.snake;
import javax.swing.*;
//游戏的主启动类
public class StartGame {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setBounds(10,10,900,720);
frame.setResizable(false);//窗口大小不可变
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
//失常的游戏面板都应该在面板上
frame.add(new GamePanel());
frame.setVisible(true);
}
}
GamePanel.java
package com.xiaoyu.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;
public class GamePanel extends JPanel implements KeyListener, ActionListener {
//定义蛇的数据结构
int lenght;//蛇的长度
int[] snakeX=new int[600];//蛇的x坐标
int[] snakeY=new int[500];//蛇的y坐标
String fx="R";
//食物的坐标
int foodx;
int foody;
Random random=new Random();
int score;//问题
//游戏以后的状态 开始 进行
boolean isStart = false;//默认进行
boolean isFail=false;
//定时器
Timer timer=new Timer(100,this);//100毫秒执行一次！
//结构器
public GamePanel(){
init();
this.setFocusable(true);//取得焦点事件
this.addKeyListener(this);//取得键盘监听事件
timer.start();//游戏一开始定时器就启动
}
//初始化办法
public void init(){
lenght = 3;
snakeX[0] = 100;snakeY[0] = 100;//脑袋的坐标
snakeX[1] = 75;snakeY[1] = 100;//第一个身材的坐标
snakeX[2] = 50;snakeY[2] = 100;//第二个身材的坐标
fx="R";
//将食物随机散布在界面上
foodx=25+25*random.nextInt(34);
foody=75+25*random.nextInt(24);
score=0;
}
//绘制面板,咱们游戏中的所有大小都由这只画笔来画
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);//清屏
//绘制动态的面板
this.setBackground(Color.BLACK);
Data.header.paintIcon(this,g,25,11);//头部广告栏画下来
g.fillRect(20,75,850,600);
//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.food.paintIcon(this,g,foodx,foody);
//把小蛇画下来
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 < lenght ; i++) {
Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
}
//游戏状态
if (isStart==false){
g.setColor(Color.WHITE);
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("按下空格开始游戏",300,300);
}
//游戏失败
if (isFail){
g.setColor(Color.RED);
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("失败，按下空格从新开始",300,300);
}
}
//键盘监听事件
@Override
public void keyPressed(KeyEvent e) {
int keyCode=e.getKeyCode();
if (keyCode==KeyEvent.VK_SPACE){
if (isFail){
isFail = false;
init();
}else {
isStart=!isStart;
}
repaint();
}
//小蛇挪动
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
//吃食物
if (snakeX[0] == foodx && snakeY[0]==foody){
lenght++;//长度加一
score+=10;//分数加十
//再次随机生成食物
foodx=25+25*random.nextInt(34);
foody=75+25*random.nextInt(24);
}
//挪动
for (int i = lenght-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;}
}
//失败的断定，撞到本人
for (int i = 1; i < lenght ; i++) {
if (snakeX[0]==snakeX[i]&&snakeY[0]==snakeY[i]){
isFail= true;
}
}
repaint();//重画页面
}
timer.start();//定时器开始
}
@Override
public void keyTyped(KeyEvent e) { }
@Override
public void keyReleased(KeyEvent e) { }
}
Data.java
package com.xiaoyu.snake;
import javax.swing.*;
import java.net.URL;
//数据中心
public class Data {
public static URL headerURL = Data.class.getResource("static/header.png");
public static ImageIcon header=new ImageIcon(headerURL);
public static URL upURL = Data.class.getResource("static/up.png");
public static ImageIcon up=new ImageIcon(upURL);
public static URL downURL = Data.class.getResource("static/down.png");
public static ImageIcon down=new ImageIcon(downURL);
public static URL leftURL = Data.class.getResource("static/left.png");
public static ImageIcon left=new ImageIcon(leftURL);
public static URL rightURL = Data.class.getResource("static/right.png");
public static ImageIcon right=new ImageIcon(rightURL);
public static URL bodyURL = Data.class.getResource("static/body.png");
public static ImageIcon body=new ImageIcon(bodyURL);
public static URL foodURL = Data.class.getResource("static/food.png");
public static ImageIcon food=new ImageIcon(foodURL);
}
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