摘要: # 假设 class Food {} class Fruit extends Food {} class Apple extends Fruit {} class Orange extends Fruit{} # ? extends class extends 很直接明了,继承。这句话含义:某个类继 阅读全文
posted @ 2017-04-02 01:03 Piers 阅读(245) 评论(0) 推荐(0) 编辑