java如何控制贪吃蛇的移动方向

java如何控制贪吃蛇的移动方向

X、Y两个中，某一个加、或减

package cn.itcast.snake.controller;

import java.awt.font; import java.awt.event.keyadapter; import java.awt.event.keyevent; import java.util.hashset; import java.util.set;

import javax.swing.jlabel;

import cn.itcast.snake.entities.food; import cn.itcast.snake.entities.ground; import cn.itcast.snake.entities.snake; import cn.itcast.snake.listener.gamelistener; import cn.itcast.snake.listener.snakelistener; import cn.itcast.snake.util.global; import cn.itcast.snake.view.gamepanel;

public class controller extends keyadapter implements snakelistener {

   private ground ground;

   private snake snake;

   private food food;

   private gamepanel gamepanel;

   private jlabel gameinfolabel;

 private boolean playing;

 private int map;

   private set<gamelistener> listeners = new hashset<gamelistener>();

   public void keypressed(keyevent e) {   if (e.getkeycode() != keyevent.vk_y && !playing)    return;   // todo auto-generated method stub      switch (e.getkeycode()) {

     case keyevent.vk_up:    if (snake.ispause()) {     snake.changepause();     for (gamelistener l : listeners)     l.gamecontinue();    }    snake.changedirection(snake.up);    break;      case keyevent.vk_down:    if (snake.ispause()) {     snake.changepause();     for (gamelistener l : listeners)     l.gamecontinue();    }    snake.changedirection(snake.down);    break;      case keyevent.vk_left:    if (snake.ispause()) {     snake.changepause();     for (gamelistener l : listeners)     l.gamecontinue();    }    snake.changedirection(snake.left);    break;      case keyevent.vk_right:    if (snake.ispause()) {     snake.changepause();     for (gamelistener l : listeners)     l.gamecontinue();    }    snake.changedirection(snake.right);    break;      case keyevent.vk_enter:   case keyevent.vk_space:    snake.changepause();        for (gamelistener l : listeners)     if (snake.ispause())     l.gamepause();     else     l.gamecontinue();    break;      case keyevent.vk_page_up:    snake.speedup();    break;      case keyevent.vk_page_down:    snake.speeddown();    break;      case keyevent.vk_y:    if (!isplaying())     newgame();    break;   }

     if (gamepanel != null)    gamepanel.redisplay(ground, snake, food);      if (gameinfolabel != null)    gameinfolabel.settext(getnewinfo());  }

   public void snakemoved() {

     if (food != null && food.issnakeeatfood(snake)) {        snake.eatfood();    food.setlocation(ground == null ? food.getnew() : ground     .getfreepoint());

  }   else if (ground != null && ground.issnakeeatrock(snake)) {        stopgame();   }   if (snake.iseatbody())    stopgame();   if (gamepanel != null)    gamepanel.redisplay(ground, snake, food);      if (gameinfolabel != null)    gameinfolabel.settext(getnewinfo());  }

   public void newgame() {

  if (ground != null) {    switch (map) {    case 2:     ground.clear();     ground.generaterocks2();     break;    default:     ground.init();     break;    }   }   playing = true;

  snake.renew();   for (gamelistener l : listeners)    l.gamestart();  }

   public void stopgame() {   if (playing) {    playing = false;    snake.dead();    for (gamelistener l : listeners)     l.gameover();   }  }

   public void pausegame() {   snake.setpause(true);   for (gamelistener l : listeners)    l.gamepause();  }

   public void continuegame() {   snake.setpause(false);   for (gamelistener l : listeners)    l.gamecontinue();  }

   public controller(snake snake, food food, ground ground, gamepanel gamepanel) {   this.snake = snake;   this.food = food;   this.ground = ground;   this.gamepanel = gamepanel;      if (ground != null && food != null)    food.setlocation(ground.getfreepoint());      this.snake.addsnakelistener(this);  }

   public controller(snake snake, food food, ground ground,    gamepanel gamepanel, jlabel gameinfolabel) {

  this(snake, food, ground, gamepanel);   this.setgameinfolabel(gameinfolabel);

  if (gameinfolabel != null)    gameinfolabel.settext(getnewinfo());  }

   public string getnewinfo() {   if (!snake.islive())    return " ";// " 提示: 按 y 开始新游戏";   else    return new stringbuffer().append("提示: ").append("速度 ").append(     snake.getspeed()).tostring()     + " 毫秒/格";  }

   public synchronized void addgamelistener(gamelistener l) {   if (l != null)    this.listeners.add(l);  }

   public synchronized void removegamelistener(gamelistener l) {   if (l != null)    this.listeners.remove(l);  }

   public snake getsnake() {   return this.snake;  }

   public food getfood() {   return this.food;  }

   public ground getground() {   return this.ground;  }

   public void snakeeatfood() {   // todo auto-generated method stub   system.out.println("吃到食物!");  }

 public gamepanel getgamepanel() {   return gamepanel;  }

   public void setgamepanel(gamepanel gamepanel) {   this.gamepanel = gamepanel;  }

 public jlabel getgameinfolabel() {   return gameinfolabel;  }

 public void setgameinfolabel(jlabel gameinfolabel) {   this.gameinfolabel = gameinfolabel;   this.gameinfolabel.setsize(global.width * global.cell_width, 20);   this.gameinfolabel.setfont(new font("宋体", font.plain, 12));   gameinfolabel.settext(this.getnewinfo());  }

 public void setground(ground ground) {   this.ground = ground;  }

 public void setsnake(snake snake) {   this.snake = snake;  }

 public void setfood(food food) {   this.food = food;  }

 public int getmap() {   return map;  }

 public void setmap(int map) {   this.map = map;  }

 public boolean isplaying() {   return playing;  }

 public void setplaying(boolean playing) {   this.playing = playing;  }

 public boolean ispausinggame() {   // todo auto-generated method stub   return snake.ispause();  }

}

这边提示说不能超过10000字，我这边只发了控制器的代码，还有对象和监听的代码没贴上，要的话邮箱发我