Java并发编程volatile关键字-阿里云

Java并发编程-volatile关键字介绍前言要学习好Java的多线程,就一定得对volatile关键字的作用机制了熟于胸。最近博主看了大量关于volatile的相关博客,对其有了一点初步的理解和认识，下面通过自己的话叙述整理一遍。有什么用？ volatile主要对所修饰的变量提供两个功能可见性防止指令重排序本篇博客主要对vola...

Java并发编程 -- 深入剖析volatile关键字 1.volatile关键字的两层语义一旦一个共享变量（类的成员变量、类的静态成员变量）被volatile修饰之后，那么就具备了两层语义：保证了不同线程对这个变量进行操作时的可见性，即一个线程修改了某个变量的值，这新值对其他线程来说是立即可见的。禁止进行指令重排序。我们来看一段代码：假如线程...

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