Java – 纸牌游戏机类OOP设计

***Classes**


    1. player class only

           public class player{
           }
           public class AIPlayer{
           } 

    2. base class player

           public abstract class player{
           }
           public class HumanPlayer extends player{
           }
           public class APlayer extends player{
           }

    3. interface player

         public interface IPlayer{
         }
         public class Player implements IPlayer{}
         public class AIPlayer implements IPlayer{}


*** Methods**
    takeTurn()    
    doDiscard()
doDraw() //pick from discard pile or deck
doKnock()

我理解上面代码的使用,但我无法决定应用或实现哪一个.我是OOP或设计模式的新手,你的建议和代码示例将是一个非常大的帮助.