package cd.itcast.snake;import java.awt.BorderLayout;import java.awt.Point;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.util.LinkedList;import java.util.Random;import javax.swing.JButton;import javax.swing.JFrame;import cn.itcast.util.FrameUtil;public class SnakeGame {    //宽度（列数）x    public static final int WIDTH = 50;    //高度（行数）y    public static final int HEIGHT = 10;    //地图    private char[][] background = new char[HEIGHT][WIDTH];        //初始化地图    private void initBackground() {        for(int rows = 0 ; rows < background.length ; rows++){            for(int cols = 0 ; cols < background[rows].length ; cols++){                if (rows==0||rows==(background.length-1)) {                    background[rows][cols]='*';                }else {                    background[rows][cols]=' ';                }            }        }    }    //显示地图的        private void showBackground() {            for(int rows = 0 ; rows < background.length ; rows++){                for(int cols = 0 ; cols < background[rows].length ; cols++){                    System.out.print(background[rows][cols]);                }                System.out.println();            }        }    //使用集合保存蛇所有信息    LinkedList
     
       snake = new LinkedList
      
       ();    //初始化蛇    public void initsnake() {        int x = WIDTH/2;        int y = HEIGHT/2;        snake.addFirst(new Point(x-1,y));        snake.addFirst(new Point(x,y));        snake.addFirst(new Point(x+1,y));    }    //显示蛇--》蛇的节点信息，反馈到地图上    public void showSnake() {        //画蛇身,因为取出了蛇身，所以从1开始        for(int i=1; i