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java并发笔记之synchronized 偏向锁轻量级锁重量级锁证明本篇将从hotspot源码（64 bits）入手，通过分析java对象头引申出锁的状态；本文采用大量实例及分析，请耐心看完，谢谢先来看一下hotspot的源码当中的对象头的注释（32bits 可以忽略了，现在基本没有32位操...

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