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import java.awt.*;
import java.awt.event.*;
import java.util.*;
//===================¸ÃÀàÊÇ¿ØÖÆÉßÒÆ¶¯µÄ´°¿Ú===================================================
class snakeCanvas extends Panel implements Runnable, KeyListener
{
 private Label b[] ;  //ÉßµÄÖ÷Ìå
 private Button food ;  // ʳÎï
 private Thread thread;  //Ïß³Ì
 private int count = 1, i;  //count±íʾÉßµÄÊýÁ¿
 private int xFood, yFood ; //±íʾʳÎïµÄ×ø±ê 
 private int x = 5, y = 0; //¿ØÖÆÉßÍ·µÄ×ø±ê
 private boolean  up = false, down = false, right = true, left = false;  //ÓÃÀ´¿ØÖÆÉߵķ½Ïò
 private boolean Game = true ;  // ÅжÏÓÎÏ·ÊÇ·ñ½áÊø
 snakeCanvas()
 {
  setSize( 510, 515 );
  thread = new Thread(this);
  setLayout(null);
  setBackground(Color.green); //ÉèÖñ³¾°ÑÕÉ«
  
  b = new Label[50] ; 
  //¶ÔÉߵijõʼ»¯
  for ( int i = 0; i < 30; i++ )
  {
   b[i] = new Label("¿Ú") ;
   b[i].setSize( 10, 10 ) ;
  }
  b[0].setBounds(5, 0, 10, 10);
  add(b[0]); //Ìí¼Ó×é¼þ
  //====================ʳÎïµÄËæ»ú×ø±ê=================================
  xFood = 10*(int)( ( Math.random() + 0.01 ) * 50 ) + 5 ;
  yFood = 10*(int)( ( Math.random() + 0.01 ) * 50 )  ;
  
 }
 public void keyTyped( KeyEvent e){} 
 public void keyReleased(KeyEvent e){}
 //=========¼üÅÌʼþ=========================
 public void keyPressed(KeyEvent e)
 {
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