https://answer.freetools.me/tags/%E5%88%86%E6%AE%B5%E9%94%81/ Recent content in 分段锁 on Answer Hugo -- 0.152.2 zh-cn Sun, 08 Mar 2026 16:09:54 +0800 https://answer.freetools.me/concurrenthashmap%E7%9A%84%E5%8D%81%E4%BA%94%E5%B9%B4%E6%BC%94%E8%BF%9B%E4%BB%8E%E5%88%86%E6%AE%B5%E9%94%81%E5%88%B0cas%E5%A6%82%E4%BD%95%E9%87%8D%E5%A1%91java%E5%B9%B6%E5%8F%91%E5%9F%BA%E7%9F%B3/ Sun, 08 Mar 2026 16:09:54 +0800 https://answer.freetools.me/concurrenthashmap%E7%9A%84%E5%8D%81%E4%BA%94%E5%B9%B4%E6%BC%94%E8%BF%9B%E4%BB%8E%E5%88%86%E6%AE%B5%E9%94%81%E5%88%B0cas%E5%A6%82%E4%BD%95%E9%87%8D%E5%A1%91java%E5%B9%B6%E5%8F%91%E5%9F%BA%E7%9F%B3/ 深入解析ConcurrentHashMap从JDK 7分段锁到JDK 8 CAS+synchronized的重大架构演进。剖析Doug Lea的设计哲学、桶级细粒度锁策略、红黑树优化、多线程协作扩容机制、LongAdder式计数方案，以及synchronized在JVM层面的优化演进。