谁和我一起做个贪吃蛇程序？

Question

package snake;
import javax.swing.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class SnakeL extends JFrame implements KeyListener
{
SnakeBody sb;
Snake snake;


public SnakeL(String title){
super(title);
snake=new Snake();
sb=snake.sb;
Container container=getContentPane();
container.setLayout(new FlowLayout());


addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent we)
{
System.exit(0);
}});
setSize(300,300);
setLocation(100,100);
container.add(snake);
addKeyListener(this);
setVisible(true);
}

 public void keyPressed(KeyEvent e) 
   {
   
    int key=e.getKeyCode();
    switch(key)
    {
    case KeyEvent.VK_DOWN:
    sb.changeDirection(key);
    break;
   
    case KeyEvent.VK_UP:
      sb.changeDirection(key);
        break;
    case  KeyEvent.VK_LEFT:
    sb.changeDirection(key);
        break;
    case KeyEvent.VK_RIGHT:
    sb.changeDirection(key);
        break;
    case KeyEvent.VK_ESCAPE:
        sb.isAlive=false;
        break;
    case KeyEvent.VK_SPACE:
    snake.begin();
    System.out.println("snakel space key down");
    break;
   
    default:
        break;
    }
   
    }       
 public void keyReleased(KeyEvent e){}      
 public void keyTyped(KeyEvent e){}  
public static void main(String args[])
{
new SnakeL("贪吃蛇");
}

}

Answer 1

package snake;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.awt.image.*;
class SnakeBody{
//int cell=10;
public Vector vector;
static final int UP=1,DOWN=2,LEFT=5,RIGHT=10;
    //int direction=0;
    int currentDirection=0;
int headx,heady;
int head=-1;
int tail=-1;
int max=100;
int body[][]=new int[max][2];
boolean isAlive=true;
Thread thread;
public void init()
{
currentDirection=RIGHT;
isAlive=true;
head=2;
     tail=0;
     for(int i=tail;i<=head;i++)
     {
     body[tail][0]=tail+1;
     body[tail][1]=tail+2;
     }
     headx=body[head][0];
     heady=body[head][0];
    }
    public SnakeBody(){
     init();
      }

//蛇前进
public void go(){
headx=body[head][0];
heady=body[head][1];
newHead();
System.out.println("in SnakeBody.go()");

}

//蛇在前进中产生新的蛇头
public void newHead(){
switch(currentDirection)
{
case UP:
    heady--;
    break;
    case DOWN:
    heady++;
    break;
    case LEFT:
    headx--;
    break;
    case RIGHT:
    headx++;
    break;
    default:
    break;
  }
    if(hasDie())
    //stop();
    isAlive=false;
    if(++head==max)
    head=0;
    body[head][0]=headx;
    body[head][1]=heady;
    //currentDirection=direction;
}

//转变方向
public void changeDirection(int direction)
{
//this.direction=direction;
System.out.println("in changeDirection");
if(direction==currentDirection)
return ;
if(direction/2==currentDirection)
return ;
if(direction*2==currentDirection)
return ;

currentDirection=direction;

}


    
    //判断是否死了
public boolean hasDie(){
if(eatSelf()||outBoundary())//吃自己或者出界
{
isAlive=false;
thread=null;
System.out.println("headx:"+body[head][0]+"   heady:"+body[head][1]);
System.out.println("game over!");
return true;
}
return false;
}

//是否吃自己
public boolean eatSelf(){
if(contain(headx,heady))
return true;
return false;
}


//是否包含次节点
public boolean contain(int x,int y){
if(head>tail)
{
for(int i=tail;i<=head;i++)
{
if(body[i][0]==x&&body[i][1]==y)
return true;
}                    
}
if(head<tail)
{
for(int i=tail;i<max;i++)
{
if(body[i][0]==x&&body[i][1]==y)
return true;
}
for(int i=0;i<=head;i++)
{
if(body[i][0]==x&&body[i][1]==y)
return true;
}
}
return false;
}
public boolean outBoundary(){
if(headx<0||headx>9||heady<0||heady>9)
return true;
return false;
}


public void removeTail(){
if(++tail==max)
tail=0;
} public boolean hasEat(int foodx,int foody)
{
if(foodx==headx&&foody==heady)
return true;
return false;
}

}