wawatou.java

我的是一般的j2me的源码

import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.lcdui.*;
import java.util.Random;


public class wawatou extends MIDlet 
{
	Can can;
	Display display;

	public wawatou() 
	{
		super();
		display=Display.getDisplay(this);

		can=new Can();
		can.start();
	
		// TODO Auto-generated constructor stub
	}

	protected void startApp() throws MIDletStateChangeException 
	{
		display.setCurrent(can);
		// TODO Auto-generated method stub
	}
	protected void pauseApp()
	{
		// TODO Auto-generated method stub
	}
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException 
	{
		// TODO Auto-generated method stub
	}
}
class Can extends Canvas implements Runnable
{
	int n=270;//蛇头嘴巴的起始角度
	int x=0,y=0,s=45;//蛇头的位置
	int x1=0,y1=0;//食物的位子
	int x2=0,y2=0;//
	int f=1;//在蛇到边界时，转向的随机变量
	Random rand1,rand2,fx;//rand为食物的坐标，fx为蛇到边界时要走的方向；
	boolean eat=true; //吃到食物没有
	boolean widthl=false;//是否在界外(左 右 上 下)
	boolean widthr=false;
	boolean heightu=false;
	boolean heightd=false;
	protected void paint(Graphics g)
	{
		g.setColor(255,255,255);
		g.fillRect(0, 0, this.getWidth(), this.getHeight());
		g.setColor(200,0, 0);
		g.fillArc(x,y, 10, 10, s, n);
		repaint();
		
//		g.setColor(0,255,0);
//		g.fillArc(0,5, 10,10,0,360);//无用的
		
		
		//作为主角的出边碰撞检测 true为界外，false为界内
		if(x>getWidth()-15)
		{
			widthr=true;
		}
		else
			widthr=false;
		if(x<5)
		{
			widthl=true;
		}
		else
			widthl=false;
		if(y>getHeight()-15)
		{
			heightd=true;
		}
		else
			heightd=false;
		if(y<5)
		{
			heightu=true;
		}
		else
			heightu=false;
			
			
		
		//随即产生一个点，作为食物
		if(eat)
		{
			rand1=new Random();//当eat为真，就是食物被吃了时生成食物的坐标
			rand2=new Random();
			do
			{
			x1=rand1.nextInt(getWidth()-10);
			y1=rand2.nextInt(getHeight()-10);//此句有问题。？？
			}while(x1<=0&&y1<=0&&x1%5!=0&y1%5!=0);
			eat=false;
		}
	
			switch(s)//画尾巴
			{
				
				case 225://嘴巴向左
				
					if(widthl)
					{
						if(f==1)
						{
							s=135;
						}
						else
						{
							s=315;
						}
					}
					g.setColor(255,0,255);
					g.fillArc(x2,y2, 10,10,0,360);
					repaint();
					
					break;
					
				case 45://嘴巴向右
				
					if(widthr)
					{
						if(f==1)
						{
							s=315;
						}
						else
						{
							s=135;
						}
					}
					g.setColor(255,0,255);
					g.fillArc(x2, y2, 10, 10, 0, 360);
					repaint();
					
					break;
				
				case 135://嘴巴向上
					
					if(heightu)
					{
						if(f==1)
						{
							s=45;
						}
						else
						{
							s=225;
						}
					}
					g.setColor(255,0,255);
					g.fillArc(x2, y2, 10, 10, 0, 360);
					repaint();
					
					break;
					
				
				case 315://嘴巴向下
				
					if(heightd)
					{
						if(f==1)
						{
							s=225;
						}
						else
						{
							s=45;
						}
					}
					g.setColor(255,0,255);
					g.fillArc(x2, y2, 10, 10, 0, 360);
					repaint();
				
					break;
				
			}

		
		if(eat==false)
		{
			g.setColor(0,255,0);
			g.fillArc(x1,y1, 10,10,0,360);//用随机数画食物
			fx=new Random();
			f=fx.nextInt(2);
		}
		//判断是否吃到食物，做一个食物的生成开关 ，true是吃掉，false是存在
		if(x1+10>x&&x1+1<x+10&&y1+10>y&&y1+1<y+10)
		{
			eat=true;
		}
	}
	public void run()
	{
		while(true)
		{
			//System.out.print("aa");
			try
			{
				Thread.sleep(200);
				if(n==270)
				{
					n=360;
				}
				else
				{
					if(n==360)
					{
						n=270;
					}
				}
			}catch(InterruptedException e)
			{
				e.printStackTrace();
			}

			try
			{
				Thread.sleep(100);
				switch(s)
				{
					
					case 225:
						
						x2=x;
						y2=y;
						x=x-10;
						
						break;
					
					case 45:
					
						x2=x;
						y2=y;
						x=x+10;
						
						break;
						
					case 135:
					
						x2=x;
						y2=y;
						y=y-10;
						
						break;
					
					case 315:
					
						x2=x;
						y2=y;
						y=y+10;
						
						break;	
					
				}
			}
			catch(InterruptedException e)
			{
					e.printStackTrace();
			}
		}
		
	}

	public void start()
	{
		Thread t=new Thread(this);
		t.start();
	}
	protected void keyPressed(int keyCode) 

	{
		int key=getGameAction(keyCode);
		
		//是否对运动做反应,界外不反应
	
			if(widthl==false&&key==LEFT)
			{
				
				s=225;
			} 
			if(widthr==false&&key==RIGHT)
			{
				
				s=45;
			} 
			if(heightu==false&&key==UP)
			{
				
				s=135;
			}
			if(heightd==false&&key==DOWN)
			{
				
				s=315;
			}
		
	}
}