/* filename: InnerClassUpperCase2.java
 */

package cs.ch7;

class Cat
{

    public void eat(Fish fish)
    {
        System.out.println("猫正在吃"+fish);
    }

}


interface Fish
{
}


class PetStore                
{

    private class Sardine implements Fish
    {
        private String name;

        public Sardine()
        {
            name="沙丁鱼";
        }

        public String toString()
        {
            return name;
        }
    }

    private class Herring implements Fish
    {
        private String name;

        public Herring()
        {
            name="青鱼";
        }

        public String toString()
        {
            return name;
        }

    }

    private class Tuna implements Fish
    {
        private String name;

        public Tuna()
        {
            name="金枪鱼";
        }

        public String toString()
        {
            return name;
        }
    }

    public Fish provideSardine()
    {
        return new Sardine();
    }

    public Fish provideHerring()
    {
        return new Herring();
    }

    public Fish provideTuna()
    {
        return new Tuna();
    }
} 

//====================================== class  InnerClassUpperCase2 测试类，含main()
//====
public class InnerClassUpperCase2
{

    public static void main(String[] args)
    {
        Cat cat=new Cat();                 //生成Cat类的对象。
        PetStore petStore=new PetStore();          //生成Petstore对象。
        cat.eat(petStore.provideSardine());
        cat.eat(petStore.provideHerring());
        cat.eat(petStore.provideTuna());
    }
}
//====================================== end class  InnerClassUpperCase2