weixin_42078778的博客

转一篇文章！ 总结的很到位。。。。 http://www.uml.org.cn/oobject/201609062.asp

inheritance --is a polymorphism ——{override, overload} modularity abstraction aggregation + composition {has a} Java language 6. collection —{arraylist,set,hash map,linklist, queue} -is a UML modeli...