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ConcurrentHashMap实现原理:面试官最爱的并发八股
ConcurrentHashMap从JDK1.7到JDK1.8,底层实现发生了翻天覆地的变化。**Segment分段锁被彻底抛弃,改用CAS+synchronized,锁粒度从"段"细化到了"桶"**。这个变化,直接决定了面试的成败。 一、面试场景引入 上周一个朋友去阿里面试,回来跟我吐槽:"面试官问我 ...
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