snake.java

贪吃蛇 Java源代码 此类是贪吃蛇的简单实现方法 * 自己可以加入在开始时的设置

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import static java.lang.Math.*;//静态导入
/*
 * 此类是贪吃蛇的简单实现方法
 * 自己可以加入在开始时的设置，比如
 * 选关，初始的蛇的长度等等
 * 作者：千里冰封
 * 日期：2006年6月25日15：47
 */
public class Snake extends JPanel{
	private Direction dir;//要走的方向
	private int blockWidth=10;//块大小
	private int blockSpace=2;//块之间的间隔
	private long sleepTime;//重画的进间间隔
	private MySnake my;
	private int total;//代表蛇的长度
	private Rectangle food;//代表蛇的食物
	private volatile boolean go;
	private int round;//表示第几关
	public Snake(JFrame jf){
		initOther();
		//为顶级窗口类JFrame添加事件处理函数
		jf.addKeyListener(new KeyAdapter(){
			public void keyReleased(KeyEvent ke){
				int code=ke.getKeyCode();
				if(code==KeyEvent.VK_RIGHT){
					if(dir!=Direction.WEST)
						dir=Direction.EAST;
				}
					
				else if(code==KeyEvent.VK_LEFT){
					if(dir!=Direction.EAST)
						dir=Direction.WEST;
				}
					
				else if(code==KeyEvent.VK_UP){
					if(dir!=Direction.SOUTH)
						dir=Direction.NORTH;
				}
					
				else if(code==KeyEvent.VK_DOWN){
					if(dir!=Direction.NORTH)
						dir=Direction.SOUTH;
				}
				else if(code==KeyEvent.VK_ENTER){
					if(!go)
					initOther();
				}
			}
		});
		this.setBounds(300,300,400,400);
		this.setVisible(true);
	}
	//随机生成一个食物的位置
	private void makeFood(){
		int x=40+(int)(random()*30)*12;
		int y=10+(int)(random()*30)*12;
		food=new Rectangle(x,y,10,10);
	}
	//做一些初始化的工作
	private void initOther(){
		dir=Direction.EAST;
		sleepTime=500;
		my=new MySnake();
		makeFood();
		total=3;
		round=1;
		new Thread(new Runnable(){
			public void run(){
				go=true;
				while(go){
					try{
						Thread.sleep(sleepTime);
						repaint();
					}
					catch(Exception exe){
						exe.printStackTrace();
					}
				}
			}
		}).start();
	}
	//处理多少关的函数
	private void handleRound(){
		if(total==6){
			round=2;
			sleepTime=300;
		}
		else if(total==10){
			round=3;
			sleepTime=200;
		}
		else if(total==15){
			round=4;
			sleepTime=100;
		}
		else if(total==18){
			round=5;
			sleepTime=50;
		}
		else if(total==20){
			round=6;
			sleepTime=20;
		}
		else if(total>21){
			round=7;
			sleepTime=15;
		}
	}
	//把自己的组件全部画出来
	public void paintComponent(Graphics g){
			g.setColor(Color.PINK);
			g.fillRect(0,0,this.getWidth(),this.getHeight());
			g.setColor(Color.BLACK);
			g.drawRect(40,10,358,360);
			if(go){
				my.move();
				my.draw(g);
				g.setFont(new Font("黑体",Font.BOLD,20));
				g.drawString("您的得分："+(total*10)+"      第"+round+"关",40,400);
			}
			else{
				g.setFont(new Font("黑体",Font.BOLD,20));
				g.drawString("游戏结束,按回车(ENTER)键重玩！",40,440);
			}
			g.setColor(Color.RED);
			g.fillRect(food.x,food.y,food.width,food.height);
	}
	private class MySnake{
		private ArrayList<Rectangle> list;
		public MySnake(){
			list=new ArrayList<Rectangle>();
			list.add(new Rectangle(160+24,130,10,10));
			list.add(new Rectangle(160+12,130,10,10));
			list.add(new Rectangle(160,130,10,10));
		}
		//蛇移动的方法
		public void move(){
			if(isDead()){
				go=false;
				return;
			}
			if(dir==Direction.EAST){
				Rectangle rec=list.get(0);
				Rectangle rec1=new Rectangle(rec.x+(blockWidth+blockSpace),rec.y,rec.width,rec.height);
				list.add(0,rec1);
			}
			else if(dir==Direction.WEST){
				Rectangle rec=list.get(0);
				Rectangle rec1=new Rectangle(rec.x-(blockWidth+blockSpace),rec.y,rec.width,rec.height);
				list.add(0,rec1);
			}
			else if(dir==Direction.NORTH){
				Rectangle rec=list.get(0);
				Rectangle rec1=new Rectangle(rec.x,rec.y-(blockWidth+blockSpace),rec.width,rec.height);
				list.add(0,rec1);
			}
			else if(dir==Direction.SOUTH){
				Rectangle rec=list.get(0);
				Rectangle rec1=new Rectangle(rec.x,rec.y+(blockWidth+blockSpace),rec.width,rec.height);
				list.add(0,rec1);
			}
			if(isEat()){
				handleRound();
				makeFood();
			}
			else{
				list.remove(list.size()-1);
			}
			
		}
		//判断是否吃到了食物
		private boolean isEat(){
			if(list.get(0).contains(food)){
				total++;
				return true;
			}
			else 
				return false;
		}
		//判断是否死了，如果碰壁或者自己吃到自己都算死了
		private boolean isDead(){
			Rectangle temp=list.get(0);
			if(dir==Direction.EAST){
				if(temp.x==388)
					return true;
				else{
					Rectangle comp=new Rectangle(temp.x+12,temp.y,10,10);
					for(Rectangle rec:list){
						if(rec.contains(comp))
							return true;
					}
				}
					return false;
			}
			else if(dir==Direction.WEST){
				if(temp.x==40)
					return true;
				else {
					Rectangle comp=new Rectangle(temp.x-12,temp.y,10,10);
					for(Rectangle rec:list){
						if(rec.contains(comp))
							return true;
					}
				}
					return false;
			}
			else if(dir==Direction.NORTH){
				if(temp.y==10)
					return true;
				else{
					Rectangle comp=new Rectangle(temp.x,temp.y-12,10,10);
					for(Rectangle rec:list){
						if(rec.contains(comp))
							return true;
					}
				}
					return false;
			}
			else if(dir==Direction.SOUTH){
				if(temp.y==358)
					return true;
				else{
					Rectangle comp=new Rectangle(temp.x,temp.y+12,10,10);
					for(Rectangle rec:list){
						if(rec.contains(comp))
							return true;
					}
				}
					return false;
			}
			else{
				return false;
			}
		}
		//把自己画出来
		public void draw(Graphics g){
			for(Rectangle rec:list){
				g.fillRect(rec.x,rec.y,rec.width,rec.height);
			}
		}
		
	}
	public static void main(String arsg[]){
		JFrame jf=new JFrame("贪吃蛇");
		Snake s=new Snake(jf);
		jf.getContentPane().add(s,BorderLayout.CENTER);
		jf.setBounds(300,300,500,500);
		jf.setVisible(true);
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}
//定义一个枚举，在此也可以用接口或者常量值代替
enum Direction{
	EAST,
	SOUTH,
	WEST,
	NORTH;
}