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HashMap? ConcurrentHashMap? 相信看完这篇没人能难住你！-架构之路的博客
source link: http://blog.51cto.com/13883927/2159915
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前言Map这样的KeyValue在软件开发中是非常经典的结构，常用于在内存中存放数据。本篇主要想讨论ConcurrentHashMap这样一个并发容器，在正式开始之前我觉得有必要谈谈HashMap，没有它就不会有后面的ConcurrentHashMap。HashMap众所周知HashMap底层是基于数组+链表组成的，不过在jdk1.7和1.8中具体实现稍有不同。Base1.71.7中的数据结构图：
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