贪吃蛇的小程序

import java.awt.*;
import javax.swing.*;
import java.util.*;
import java.awt.event.*;
class  Demo
{
 public static void main(String[] args) 
 {
  Worm wo=new Worm();
 }
}
class Worm extends JFrame
{
 JPanel panel;
 Point food=null;
 private int speed=200;
 private int dir=1;//方向
 JButton contro,bu,bu2;
 ArrayList<Point> worm=new ArrayList<Point>();
 HashMap<Point,JButton> map=new HashMap<Point,JButton>();
 Dialog dia;
 Label la;
 boolean isContinue=true;
 Worm()
 {
  init();
  start();
 }
 public void init()
 {
  this.setBounds(250,100,500,500);
  this.add(setPanel());
  this.setResizable(false);
  this.myEvent();
  this.setVisible(true);
 }
 private void setdia()//设置弹出窗口
 {
  dia=new Dialog(this,"game over",true);
  bu=new JButton("重新开始");
  la=new Label("game over");
  bu2=new JButton("退出");
  dia.add(la);
  dia.add(bu);
  dia.add(bu2);
  dia.setBounds(350,200,200,100);
  dia.setLayout(new FlowLayout());
  
 }
 public JPanel setPanel()
 {
  if(panel==null)
  {
   panel=new JPanel();
   if(contro==null)
    getcontro();
   setdia();
   panel.add(contro);
   panel.setLayout(null);
   panel.setBackground(new Color(0,0,0));
   for(int i=0;i<500;i+=10)
   {
    for(int j=0;j<470;j+=10)
    {
     Point p=new Point(i,j);
     JButton jb=new JButton();
     jb.setBounds(i,j,10,10);
     jb.setBackground(new Color(255,255,255));
     jb.setEnabled(false);
     panel.add(jb,null);
     map.put(p,jb);
    }
   }
   getFood();
   addworm();
  }
  return panel;
 }
 public void getFood()
 {
  if(food==null)
  {
   Random ran=new Random();
   int x=ran.nextInt(49)*10;
   int y=ran.nextInt(46)*10;
   food=new Point(x,y);
   while(worm.contains(food))
   {
    x=ran.nextInt(49)*10;
    y=ran.nextInt(46)*10;
    food=new Point(x,y);
   }
   JButton jb1=map.get(food);
   jb1.setBackground(Color.black);
  }
 }
 public void start()//游戏开始
 {
  while(true)
  {
   System.out.println("");
   while(isContinue)
   {
    Point p=worm.get(0);
    int x=0,y=0;
    if(dir==-1)
    {
     x=(int)p.getX()-10;
     y=(int)p.getY();
    }
    if(dir==1)
    {
     x=(int)p.getX()+10;
     y=(int)p.getY();
    }
    if(dir==-2)
    {
     x=(int)p.getX();
     y=(int)p.getY()-10;
    }
    if(dir==2)
    {
     x=(int)p.getX();
     y=(int)p.getY()+10;
    }
    Point nextp=new Point(x,y);
    if(food.equals(nextp))
    {
     worm.add(0,nextp);
     map.get(nextp).setBackground(Color.red);
     food=null;
     getFood();
     if(speed!=80)
      speed-=10;
     continue;
    }
    if(worm.contains(nextp)||map.get(nextp)==null)
    {
     dia.setVisible(true);
     continue;
    }
    worm.add(0,nextp);
    map.get(nextp).setBackground(Color.red);
    map.get(worm.remove(worm.size()-1)).setBackground(Color.white);
    try{Thread.sleep(speed);}
    catch(Exception e)
    {
     throw new RuntimeException("发生错误");
    }
   }
  }
 }
 private void addworm()//构造一条贪吃蛇
 {
  worm=new ArrayList<Point>();
  for(int i=200;i<230;i+=10)
  {
   Point p=new Point(i,200);
   worm.add(0,p);
   map.get(p).setBackground(Color.red);
  }
 }
 public void getcontro()
 {
  contro=new JButton();
 }
 private void compare(int num)
 {
  if((num+dir)!=0)
   dir=num;
 }
 private void resum()//重构游戏
 {
  ListIterator<Point> it=worm.listIterator();
  while(it.hasNext())
  {
   map.get(it.next()).setBackground(Color.white);
  }
  map.get(food).setBackground(Color.white);
  food=null;
  getFood();
  addworm();
  dia.setVisible(false);
  speed=200;
  if(dir==-1)
   dir=1;
 }
 private void myEvent()//所有监听器
 {
  this.addWindowListener(new WindowAdapter()
  {
   public void windowClosing(WindowEvent e)
   {
    System.exit(0);
   }
  });
  bu.addActionListener(new ActionListener()
  {
   public void actionPerformed(ActionEvent e)
   {
    resum();
   }
  });
  bu2.addActionListener(new ActionListener()
  {
   public void actionPerformed(ActionEvent e)
   {
    System.exit(0);
   }
  });
  contro.addKeyListener(new KeyAdapter()
  {
   public void keyPressed(KeyEvent l)
   {
    int numb=l.getKeyCode();
    switch(numb)
    {
     case KeyEvent.VK_LEFT :compare(-1);break;
                    case KeyEvent.VK_RIGHT :compare(1);break;
                    case KeyEvent.VK_UP :compare(-2);break;
                    case KeyEvent.VK_DOWN :compare(2);break;
     case KeyEvent.VK_ENTER:isContinue=true;break;
                    case KeyEvent.VK_SPACE:isContinue=false;break;
    }
   }
  });
 }
}

自制贪吃蛇小游戏