摘要: 代码如下:public class Client{ public static void main(String[] args){ Person p = new Person(); Dog d = new Dog(); Cat c = new Cat(); p.feed(d); }}public c... 阅读全文
posted @ 2015-03-24 21:19 红心老K 阅读(269) 评论(0) 推荐(1) 编辑