项目介绍

项目背景

总体需求

本系统主要是完成贪吃蛇游戏的基本操作，用户可自己练习和娱乐。需要满足以下几点要求:

实现过程

代码展示

主类：Demo类

package Demo;
/**
 * 1.画出窗体对象
 * 
 * 
 * @author 青00-Java
 *
 */
public class Demo0 {

}

MyPanel类

构造方法

package Demo;

import java.awt.Color;
import java.awt.Component;
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;
//画布类
public class MyPanel extends JPanel implements KeyListener,ActionListener{//继承
	private static final Component This = null;
//键盘监听交互接口
int length;
int score;
int[] snakeX=new int[500];//坐标
int[] snakeY=new int[500];
String fx;
boolean ifStart=false;
//定时器
Timer timer =new Timer(100,this);
int foodx;
int foody;
Random random =new Random();

public MyPanel(){
	init();
	//添加监听事件
	this.setFocusable(true);
	this.addKeyListener(this);
	score=0;
}

初始化方法

public void init(){
	length=3;
	fx="r";
	//初始化小蛇的位置
	snakeX[0]=100;
	snakeY[0]=150;
	snakeX[1]=75;
	snakeY[1]=150;
	snakeX[2]=50;
	snakeY[2]=150;
	foodx=25+25*random.nextInt(57);
	foody=125+25*random.nextInt(27);
	System.out.println(foodx);
	System.out.println(foody);
	timer.start();
}

绘制方法

	@Override
	 protected void paintComponent(Graphics g){//画笔对象
		 super.paintComponent(g);
		 //绘制顶部的标题
		 new ImageIcon("C:/Users/Desktop/img/title2.png").paintIcon(this,g,25,11);//创建对象
		 //绘制游戏区域
		 g.fillRect(25, 125, 1450, 700);
		 //绘制小蛇
		 //蛇头
		 new ImageIcon("C:/Users/Desktop/img/l.png").paintIcon(this, g, snakeX[0], snakeY[0]);
			 
		 //蛇身
		 for(int i=1;i<length;i++){
			 new ImageIcon("C:/Users/Desktop/img/body.png").paintIcon(This, g, snakeX[i], snakeY[i]);
		 }
		 //游戏的提示语
		 if(ifStart==false){
			 g.setColor(Color.white);
			 g.setFont(new Font("微软雅黑",Font.BOLD,40));
			 g.drawString("按压空格键继续游戏", 550,500);
			 g.drawString("无尽模式", 650,400);
		 }
		 //画出食物的位置
		 new ImageIcon("C:/Users/Desktop/img/body.png").paintIcon(this, g, foodx, foody);
	}
	
	@Override//按压
	public void keyPressed(KeyEvent e) {
		int keyCode=e.getKeyCode();
		if(keyCode==KeyEvent.VK_SPACE){
			ifStart=!ifStart;
		}
		if(ifStart==true){
			if(keyCode==KeyEvent.VK_LEFT&&fx!="r"){
				fx="l";
			}else if(keyCode==KeyEvent.VK_RIGHT&&fx!="l"){
				fx="r";
			}else if(keyCode==KeyEvent.VK_UP&&fx!="d"){
				fx="u";
			}else if(keyCode==KeyEvent.VK_DOWN&&fx!="u"){
				fx="d";
			}
	}
		repaint();
}

定时器执行方法

@Override
	public void actionPerformed(ActionEvent e) {
		//改变蛇的位置
		if(ifStart==true){
			for(int i=length-1;i>0;i--){
				snakeX[i]=snakeX[i-1];
				snakeY[i]=snakeY[i-1];
			}
			if(fx.equals("l")){
				snakeX[0]=snakeX[0]-25;
			    if(snakeX[0]<25){
					snakeX[0]=1450;
				}
			}else if(fx.equals("r")){
				snakeX[0]=snakeX[0]+25;
				if(snakeX[0]>1450){
					snakeX[0]=25;
				}
			}else if(fx.equals("u")){
				snakeY[0]=snakeY[0]-25;
				if(snakeY[0]<120){
					snakeY[0]=800;
				}
			}else if(fx.equals("d")){
				snakeY[0]=snakeY[0]+25;
				if(snakeY[0]>800){
					snakeY[0]=120;
				}
			}
			//判断是否吃了食物
			if(snakeX[0]==foodx&&snakeY[0]==foody){
				length++;
				score++;
				if(score==100){
					ifStart=!ifStart;
				}
				foodx=25+25*random.nextInt(57);
				foody=125+25*random.nextInt(27);
				System.out.print("当前食物坐标("+foodx+",");
				System.out.print(foody+")");
				System.out.println("|||当前分数："+score+" ");
			}
			repaint();
		}
		timer.start();
	}
	
	@Override
	public void keyReleased(KeyEvent arg0) {
		// TODO Auto-generated method stub
		
	}
	@Override
	public void keyTyped(KeyEvent arg0) {
		// TODO Auto-generated method stub
		
	}
}

框架Ui类

package Demo;

import javax.swing.JFrame;

public class Ui {

	public static void main(String[] args){
		JFrame frame=new JFrame("无尽版贪吃蛇");
		frame.setSize(1500, 900);
		frame.setLocationRelativeTo(null);//居中显示
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setResizable(true);
		frame.add(new MyPanel());
		frame.setVisible(true);
	}

}