# Java Set 总结

**URL:** <https://www.isharkfly.com/t/java-set/7061>\
**Category:** 程序语言\
**Created:** [July 31, 2014, 2:25pm UTC](https://www.isharkfly.com/t/java-set/7061 "2014-07-31T14:25:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![honeymoose](https://www.isharkfly.com/user_avatar/www.isharkfly.com/honeymoose/32/20796_2.png) [@honeymoose](https://www.isharkfly.com/u/honeymoose)\
**Post date:** [July 31, 2014, 2:25pm UTC](https://www.isharkfly.com/t/java-set/7061/1 "2014-07-31T14:25:52Z")

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1. Set实现的基础是Map（HashMap）；

2. Set中的元素是不能重复的，如果使用add(Object obj)方法添加已经存在的对象，则会覆盖前面的对象；

3.Java基本概念：集合类 List/Set/Map… 的区别和联系

Collection：List、Set

Map：HashMap、HashTable