java 设计模式之依赖倒置实例详解

/**
 * 馒头 实体类
 */
class SteamedBuns
{
  private String name = "馒头"; 
  public String getName()
  {
    return this.name;
  }
}
class Player
{
  //得了多少分
  private int intgral;
  private Sting name;
  public Player(String name)
  {
    setName(name);
  }    
  public void setName(String name)
  {
    this.name = name;
  }
  public String getName()
  {
    return name;
  }
  public void setIntgral(int intgral)
  {
    this.intgral= intgral;
  }
  public int getIntgral()
  {
    return this.intgral;
  }
  public void eat(SteamedBuns steamedBuns)
  {
    System.out.println("我开吃了");
    setIntgral(getIntgral() + 1);
  }
}
public class Main
{
  pubic static void main(String[] agrs)
  {
    Player q = new Player("Q");//选手Q
    Player w = new Player("W");//选手W
    q.eat(new SteamedBuns());//选手Q吃馒头
    w.eat(new SteamedBuns());//选手W吃馒头
  }
}

public void eat(SteamedBuns steamedBuns)//选手只支持吃馒头

public void eat(SteamedBuns steamedBuns){}   //选手支持吃馒头
public void eat(SteamedStuffedBun steamedStuffedBun){} //选手支持吃包子

/**
 * 食物接口
 */
interface Food
{
  public String getName();
}
/**
 * 馒头 实体类
 */
class SteamedBuns implements Food
{
  private String name = "馒头";
  @Override
  public String getName()
  {
    return this.name;
  }
}
/**
 * 包子 实体类
 */
class SteamedStuffedBun implements Food
{
  private String name = "包子";
  @Override
  public String getName()
  {
    return this.name;
  }
}
class Player
{
  private int intgral;
  private Sting name;
  public Player(String name)
  {
    setName(name);
  }  
  public void setName(String name)
  {
    this.name = name;
  }
  public String getName()
  {
    return name;
  }
  public void setIntgral(int intgral)
  {
    this.intgral= intgral;
  }
  public int getIntgral()
  {
    return this.intgral;
  }
  /**取消对具体食物种类的依赖
  public void eat(SteamedBuns steamedBuns)
  {
    System.out.println("我开吃了");
    setIntgral(getIntgral() + 1);
  }
  */
  public void eat(Food food)
  {
    System.out.println("我开吃了");
    setIntgral(getIntgral() + 1);
  }
}
public class Main
{
  pubic static void main(String[] agrs)
  {
    Player q = new Player("Q");//选手Q
    Player w = new Player("W");//选手W
    q.eat(new SteamedBuns());//选手Q吃馒头
    w.eat(new SteamedBuns());//选手W吃馒头
    q.eat(new SteamedStuffedBun());//选手Q吃包子
    w.eat(new SteamedStuffedBun());//选手W吃包子
  }
}