基础

https://lingcoder.github.io/OnJava8/?hmsr=codercto.com&utm_medium=codercto.com&utm_source=codercto.com#/book/01-What-is-an-Object?id=%e6%8a%bd%e8%b1%a1

talk is cheap. show me the code.
原文地址:https://www.cnblogs.com/yushizhang/p/14543001.html