Understanding the Internal Working of HashMap in Java Java’s HashMap is a highly efficient data structure used for storing key-value pairs. It is part of Java’s java.util package and is widely used in ...

网上关于 HashMap 和 ConcurrentHashMap 的文章确实不少，不过缺斤少两的文章比较多，所以才想自己也写一篇，把细节说清楚说透，尤其像 Java8 中的 ConcurrentHashMap，大部分文章都说不清楚。

HashMap vs. Hashtable similarities Both the Hashtable and HashMap implement the Map interface and both share the same set of methods used to add, remove and manipulate elements of a key-value, ...