目录前言一、为什么需要线程同步？二、Java 同步机制分类1. 内置锁（synchronized）2. 显式锁（Lock API）3. 原子变量（Atomic Classes）4. volatile 关键字三、高级同步工具1. 读写锁（ReadwriteLock）2. 条件变量（
Heres the scenario: User comes to my website and opens a webpage with some javascript functionality. User edits the data through javascript
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