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前言在Java 8中，ConcurrentHashMap的实现经历了重大的改进，其中最引人注目的变化之一就是舍弃了传统的分段锁机制，转而采用了基于CAS操作的新型分段锁设计。这一变革使得ConcurrentHashMap更好地适应了高并发环境，充分发挥了现代多核处理器的性能潜力。本文将深入探讨为何...

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JAVA8之前的ConcurrentHashMap使用什么锁实现

JAVA8的ConcurrentHashMap使用什么锁实现

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作者：上帝爱吃苹果目录1.ConcurrentHashMap的简介2.get操作源码3.volatile登场4.是加在数组上的volatile吗?5.用volatile修饰的Node6.总结我们知道，ConcurrentHashmap(1.8)这个并发集合框架是线程安全的，当你看到源码的get操...

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hashtable效率低ConcurrentHashMap 线程安全，效率高 Java 5.0 在 java.util.concurrent 包中提供了多种并发容器类来改进同步容器的性能。 ConcurrentHashMap 同步容器类是Java 5 增加的一个线程安全的哈希表。对与多线程的操作...

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