Java多线程：volatile变量、happens-before关系及内存一致性 - ImportNew



Java多线程：volatile变量、happens-before关系及内存一致性 - ImportNew

请参考来自 Jean-philippe Bempel 的评论。他提到了一个真实因 JVM 优化导致死锁的例子。我尽可能多地写博客的原因之一是一旦自己理解错了，可以从社区中学到很多。谢谢！

什么是 Volatile 变量？
Volatile 是 Java 中的一个关键字。你不能将它设置为变量或者方法名，句号。

认真点，别开玩笑,什么是 Volatile 变量？我们应该什么时候使用它？
哈哈，对不起，没法提供帮助。

volatile 关键字的典型使用场景是在多线程环境下，多个线程共享变量，由于这些变量会缓存在 CPU 的缓存中，为了避免出现内存一致性错误而采用 volatile 关键字。


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