抽象和接口

10.27

public class Zoo
{

public static void main(String args[])
{

Feeder f = new Feeder("小李");

// 饲养员小李喂养一只狮子

f.feedLion(new Lion());

// 饲养员小李喂养十只猴子

for (int i = 0; i < 10; i++)
{

f.feedMonkey(new Monkey());

}

// 饲养员小李喂养5只鸽子

for (int i = 0; i < 5; i++)
{

f.feedPigeon(new Pigeon());

}

}

}

class Feeder
{

public String name;

public Feeder(String name)
{

this.name = name;

}

public void feedLion(Lion l)
{

l.eat();

}

public void feedPigeon(Pigeon p)
{

p.eat();

}

public void feedMonkey(Monkey m)
{

m.eat();

}

}

class Lion
{

public void eat()
{

System.out.println("我不吃肉谁敢吃肉！");

}

}

class Monkey
{

public void eat()
{

System.out.println("我什么都吃，尤其喜欢香蕉。");

}

}

class Pigeon
{

public void eat()
{

System.out.println("我要减肥，所以每天只吃一点大米。");

}

}