snake2.java

请使用jdk1.3以上版本编译运行

/*
 * Snake2.java
 *
 * Created on 2004年5月5日, 下午9:01
 */

/**
 *
 *
 * @author  zhouhui
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
public class Snake2 extends JPanel implements Runnable {
     /* 0  变量声明*/
     static int speed=2;
     static int lastunitnum=0;
     static boolean isPause=false;
     static int playTimes=5;
     static JLabel label1=new JLabel("按‘P’暂停，再按其它任意键继续");
     static JLabel label2=new JLabel("您总共有  "+playTimes+" 次机会");
     static boolean isAlive=true;
     static JFrame f;
     static Thread t;
     static Random ran=new Random();
     static int unitnum=4;
     static final int north=4;static final int south=3;static final int west=2;static final int east=1;
     static int direction=south;
     static class BodyUnit                   //身体单位类声明
     {
         int xc;
         int yc;
     }
     static BodyUnit bodyunit[]=new BodyUnit[50];  //all has 50 bodyunit
     static class Food                     //食物类声明
     {
        int x;
        int y;
        Food(int xx,int yy)
        {
            this.x=xx;
            this.y=yy;
        }
     }
     Food food;

     
    /**   1 构造方法 */
    public Snake2() {
        super.setSize(600,550);
        super.setVisible(true);
        for(int i=0;i<unitnum;i++)                     //初始化bodyuint
        {
            
            bodyunit[i]=new BodyUnit();
            bodyunit[i].xc=10;
            bodyunit[i].yc=i*10+20;   
        }
        food=new Food(60, 70);                             //初始化food
        t=new Thread(this);
        t.start();
       
    }
    
    /*  2 事件响应方法*/
    public static void s2keyPressed(KeyEvent e)
    {
         if(e.getKeyCode()==39&&direction!=west)
                {
                    direction=east;
                }
           if(e.getKeyCode()==37&&direction!=east)
                {
                    direction=west;
                }
           if(e.getKeyCode()==38&&direction!=south)
                {
                    direction=north;
                }
           if(e.getKeyCode()==40&&direction!=north)
                {
                    direction=south;
                }
            if((e.getKeyChar()=='p'||e.getKeyChar()=='P')&&isAlive==true)
               {
                   isPause=true;
               }
            if(isPause==true&&e.getKeyChar()!='p'&&e.getKeyChar()!='P')
                {
                    isPause=false;
                }
             if(isAlive==false&&e.getKeyCode()==32&&playTimes>0)    //按空格继续
                {
                    lastunitnum=unitnum;
                    unitnum=4;                         //恢复初始值
                    speed=2;
                    isPause=false;
                    isAlive=true;
                }
         System.out.println(e.getKeyChar());
         System.out.println(e.getKeyCode());
         //System.out.println("speed is "+speed);
    }
    
    /*  3 画图方法*/
    public void paintComponent(Graphics g)
    {   
       g.drawLine(0,500,600,500); 
       g.drawLine(0,1,600,1);
       g.drawLine(485, 1, 485, 500);
       g.drawLine(1,1,1, 500);
       this.setSize(600,550);
       int i;                         //先画蛇
       g.clearRect(bodyunit[0].xc,bodyunit[0].yc,9,9);
       for( i=0;(i<unitnum-1);i++)
       {
           bodyunit[i].xc=bodyunit[i+1].xc;
           bodyunit[i].yc=bodyunit[i+1].yc;
           {
                g.fillRect(bodyunit[i].xc,bodyunit[i].yc,9,9);
           }
       }
       if(direction==south)
       {
           bodyunit[i].yc+=10;
           if(bodyunit[i].xc>=500)  bodyunit[i].xc-=500  ;
           if(bodyunit[i].yc>=500)  bodyunit[i].yc-=500  ;
           if(bodyunit[i].xc<0)  bodyunit[i].xc+=500  ;
           if(bodyunit[i].yc<0)  bodyunit[i].yc+=500  ;
           g.fillRect(bodyunit[i].xc,bodyunit[i].yc,9,9);
           
       }
       if(direction==north)
       {
           bodyunit[i].yc-=10;
           if(bodyunit[i].xc>=500)  bodyunit[i].xc-=500  ;
           if(bodyunit[i].yc>=500)  bodyunit[i].yc-=500  ;
           if(bodyunit[i].xc<0)  bodyunit[i].xc+=500  ;
           if(bodyunit[i].yc<0)  bodyunit[i].yc+=500  ;
           g.fillRect(bodyunit[i].xc,bodyunit[i].yc,9,9);
       }
       if(direction==east)
       {
           bodyunit[i].xc+=10;
           if(bodyunit[i].xc>=500)  bodyunit[i].xc-=500  ;
           if(bodyunit[i].yc>=500)  bodyunit[i].yc-=500  ;
           if(bodyunit[i].xc<0)  bodyunit[i].xc+=500  ;
           if(bodyunit[i].yc<0)  bodyunit[i].yc+=500  ;
           g.fillRect(bodyunit[i].xc,bodyunit[i].yc,9,9);
       }
       if(direction==west)
       {
           bodyunit[i].xc-=10;
           if(bodyunit[i].xc>=500)  bodyunit[i].xc-=500  ;
           if(bodyunit[i].yc>=500)  bodyunit[i].yc-=500  ;
           if(bodyunit[i].xc<0)  bodyunit[i].xc+=500  ;
           if(bodyunit[i].yc<0)  bodyunit[i].yc+=500  ;
           g.fillRect(bodyunit[i].xc,bodyunit[i].yc,9,9);
       }
       
        g.drawRect(food.x,food.y, 9, 9);           // 再画食物
       /*
        if(lastunitnum>unitnum)                  //若有必要的话，就擦掉身体
        {
            for(int j=unitnum;j<lastunitnum;i++)
            {
                g.clearRect(bodyunit[j].xc, bodyunit[j].yc,10, 10);
            }
            lastunitnum=0;
        }
        */
    }
    
      /* 4 睡觉方法*/
       public  void run() {
           int count=0;
       try{
            while(true&&playTimes>0)
            {
                t.sleep((int)400/speed); 
                 if(isPause==false&&isAlive==true)
                {
                        if(hitSelf())  
                        {
                            isAlive=false;
                            //playTimes--;
                            //break;
                            while(true&&isAlive==false)
                            {
                                t.sleep((int)400/speed); 
                                //repaint();
                            }
                         }
                        if(eatFood()&&(unitnum%5==3)) speed+=1;
                        repaint();
                 }
                  
             count++;
             System.out.println("count="+count+"    00000000000000000000000000000000");
             System.out.println("speed="+speed);
             System.out.println("unitnum="+unitnum);
             System.out.println("lastunitnum="+lastunitnum);
             System.out.println("playtimes="+playTimes);
             System.out.println("direction="+direction);
             
        }System.out.println("isAlive is false now");
        }catch(InterruptedException e){System.out.println("run-thread was interrupted");}
       
    }
       
   /* 5  判断（x，y）是否有蛇身体单位的方法*/
     
      public boolean hasUnit(int x,int y)
      {
          for(int i=0;i<unitnum;i++)
          {
              if(bodyunit[i].xc==x&&bodyunit[i].yc==y)  return true;
          }
          return false;
      }
     /*   6  判断（x，y）是否有食物的方法*/
      public boolean hasFood(int xx,int yy)
      {
          if(food.x==xx&&food.y==yy) return true;
          else                      return false;
      }
    /*   7  产生食物的方法 */
      public void generateFood()
      {
          boolean flag=true;
          int x,y;
          while(flag)
          {
              x=ran.nextInt(50)*10;
              y=ran.nextInt(50)*10;
              if(!hasUnit(x,y))
              {
                  flag=false;
                  food=new Food(x,y);  System.out.println("generate food successfully  "+x+"  "+y);
              }
          }
      }
      /*  8 吃食物的方法  */
      public boolean eatFood()
      { 
         boolean eatsuccess=false;
         switch (direction)
         {
             case east:
             {
                 if(hasFood(bodyunit[unitnum-1].xc+10,bodyunit[unitnum-1].yc))
                 { 
                     System.out.println("old head at "+bodyunit[unitnum-1].xc+" "+bodyunit[unitnum-1].yc+direction);
                    unitnum++;
                    bodyunit[unitnum-1]=new BodyUnit();
                     bodyunit[unitnum-1].xc=food.x;
                     bodyunit[unitnum-1].yc=food.y;
                     System.out.println(direction+"new head at"+bodyunit[unitnum-1].xc+" "+bodyunit[unitnum-1].yc);
                     generateFood();
                     eatsuccess=true;
                 }
             }break;
              case west:
             {  
                 if(hasFood(bodyunit[unitnum-1].xc-10,bodyunit[unitnum-1].yc))
                 {
                    System.out.println("old head at "+bodyunit[unitnum-1].xc+" "+bodyunit[unitnum-1].yc+direction);
                    unitnum++;
                    bodyunit[unitnum-1]=new BodyUnit();
                     bodyunit[unitnum-1].xc=food.x;
                     bodyunit[unitnum-1].yc=food.y;
                     generateFood();
                      eatsuccess=true;
                      System.out.println(direction+"new head at"+bodyunit[unitnum-1].xc+" "+bodyunit[unitnum-1].yc);
                 }
             }break;
               case north:
             {
                 if(hasFood(bodyunit[unitnum-1].xc,bodyunit[unitnum-1].yc-10))
                 {
                      System.out.println("old head at "+bodyunit[unitnum-1].xc+" "+bodyunit[unitnum-1].yc+direction);
                    unitnum++;
                    bodyunit[unitnum-1]=new BodyUnit();
                     bodyunit[unitnum-1].xc=food.x;
                     bodyunit[unitnum-1].yc=food.y;
                     generateFood();
                      eatsuccess=true;
                      System.out.println(direction+"new head at"+bodyunit[unitnum-1].xc+" "+bodyunit[unitnum-1].yc);
                 }
             }break;
                case south:
             {
                 if(hasFood(bodyunit[unitnum-1].xc,bodyunit[unitnum-1].yc+10))
                 {
                      System.out.println("old head at "+bodyunit[unitnum-1].xc+" "+bodyunit[unitnum-1].yc+direction);
                    unitnum++;
                    bodyunit[unitnum-1]=new BodyUnit();
                     bodyunit[unitnum-1].xc=food.x;
                     bodyunit[unitnum-1].yc=food.y;
                     generateFood();
                      eatsuccess=true;
                      System.out.println(direction+"new head at"+bodyunit[unitnum-1].xc+" "+bodyunit[unitnum-1].yc);
                 }
             }break;
         }
        //if(unitnum%5==3&&eatsuccess)  this.speed+=3;
         return eatsuccess;
      }
      /* 9 判断是否撞自己的方法 */
      public boolean hitSelf()
      {
          for(int i=0;i<=unitnum-4;i++)
          {
              if(bodyunit[i].xc==bodyunit[unitnum-1].xc&&bodyunit[i].yc==bodyunit[unitnum-1].yc)
              {   
                  System.out.println("      hithithit ");
                  playTimes--;
                  label2.setText("您还有 "+playTimes+"次机会 \n按空格重玩");
                  return true;
              }
          }
          return false;
      }
      /*  10   */
      public void paint(Graphics g)
      {
          super.paint(g);
          //this.paintComponent(g);
          if(lastunitnum>unitnum)                  //若有必要的话，就擦掉身体
        {
            for(int j=unitnum;j<lastunitnum;j++)
            {
                g.clearRect(bodyunit[j].xc, bodyunit[j].yc,10, 10);
            }
            lastunitnum=0;
        }
      }
    /**  主方法
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        f=new JFrame("贪吃蛇");

        f.getContentPane().add(label1,BorderLayout.SOUTH);
        label2.setSize(5,500);
        f.getContentPane().add(label2,BorderLayout.EAST);
        f.addKeyListener(new KeyAdapter()  //增添处理键盘事件的方法
        {
            public void keyPressed(KeyEvent e)
            {
               s2keyPressed(e);              // 待添加
            }
        }
        );
       final Snake2 s2=new Snake2();
       f.getContentPane().add(s2,BorderLayout.NORTH);
       f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       f.setBounds(10, 10, 600, 600);
       f.setResizable(false);
       f.setVisible(true); 
  
    }
    
   
    
}