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最近在看Guava中的Cache的源码，它的实现基于ConcurrentHashMap，前段时间组里招人，据说很多看起来很牛掰的简历，一个HashMap就能刷掉很多，所以顺便把HashMap和ConcurrentHashMap的源码复习一遍。先从HashMap开始（另：Hashtable是HashM...

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