Java设计模式-设计模式的六种原则

import java.util.LinkedList;  
import java.util.Queue;  
  
  
  
interface IEAT  
{  
    public void eat();//抽象吃这个动作  
}  
class EatApple implements IEAT  
{  
  
    @Override  
    public void eat()   
    {  
        //这里是吃苹果  
        System.out.print("eat a apple");  
          
    }  
}  
class EatWater implements IEAT  
{  
  
    @Override  
    public void eat() {  
        // 这里是吃水  
        System.out.print("dringk water");  
          
    }  
      
}  
public class Human  
{  
    public void dosomething(IEAT ieat)//我爱吃东西，吃什么呢，看传入什么  
    {  
        ieat.eat();  
    }  
    /* 
    public void dosomething(String food)//我爱吃东西，吃什么呢，看传入什么 
    { 
        if(food.equals("apple")) 
        { 
            //吃苹果 
        } 
        if(food.equals("water")) 
        { 
            //喝水 
        } 
    } 
    */  
    public static void main(String[] args)  
    {  
        Human human=new Human();  
        /* 
        human.dosomething("apple"); 
        human.dosomething("water"); 
         */  
        //给你吃个苹果  
        human.dosomething(new EatApple());  
        //再给你喝点水  
        human.dosomething(new EatWater());  
    }  
}