动物园最终版

10.31

动物园最终代码：

import java.util.Vector;

public class Zoo {

public static void main(String args[]) {
Feeder f = new Feeder("小李");
Vector<Animal> ans = new Vector<Animal>();

//饲养员小李喂养一只狮子
ans.add(new Lion());
//饲养员小李喂养十只猴子
for (int i = 0; i < 10; i++) {
ans.add(new Monkey());
}
//饲养员小李喂养5只鸽子
for (int i = 0; i < 5; i++) {
ans.add(new Pigeon());
}
f.feedAnimals(ans);
}
}

class Feeder {

public String name;

Feeder(String name) {
this.name = name;
}

public void feedAnimals(Vector<Animal> ans) {
for (Animal an : ans) {
an.eat();
}
}
}

abstract class Animal {

public abstract void eat();
}

class Lion extends Animal {

public void eat() {
System.out.println("我不吃肉谁敢吃肉！");
}
}

class Monkey extends Animal {

public void eat() {
System.out.println("我什么都吃，尤其喜欢香蕉。");
}
}

class Pigeon extends Animal {

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