📝 Writing docs.

Author: crossoverJie

MD/collection/HashSet.md

@@ -1,4 +1,4 @@
-# HashSet 底层分析
+# HashSet
 
 `HashSet` 是一个不允许存储重复元素的集合，它的实现比较简单，只要理解了 `HashMap`，`HashSet` 就水到渠成了。
 

README.md

@@ -15,7 +15,7 @@ Java 知识点，继续完善中。
 - [ArrayList/Vector](https://github.com/crossoverJie/Java-Interview/blob/master/MD/ArrayList.md)
 - [LinkedList](https://github.com/crossoverJie/Java-Interview/blob/master/MD/LinkedList.md)
 - [HashMap](https://github.com/crossoverJie/Java-Interview/blob/master/MD/HashMap.md)
-- [HashSet](https://github.com/crossoverJie/Java-Interview/blob/master/MD/HashMap.md)
+- [HashSet](https://github.com/crossoverJie/Java-Interview/blob/master/MD/collection/HashSet.md)
 - [LinkedHashMap](https://github.com/crossoverJie/Java-Interview/blob/master/MD/collection/LinkedHashMap.md)
 
 ### Java 多线程