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。");
    }
}