Java同步和重新进入锁定 [英] Java Synchronization and Re-Entrant locking

问题描述

当我们在对象上同步时，这是重新进入锁吗?同步锁和重入锁之间是否有真正的区别?

when we Synchronize on an object, is this a Re-Entrant lock? Is there a real difference between between a Synchronization lock and a Re-Entrant lock ?

亲切的问候，

推荐答案

是的，通过synchronized关键字锁定是可重新输入的.但是，它们之间的实现可以有所不同.例如，在早期版本的JVM中，ReentrantLock的实现具有比synchronized关键字更好的吞吐量.实现是否不同或如何不同取决于JVM实现/版本.

Yes, lock by synchronized keyword is re-entrant. The implementation can be different between them though. For example, in earlier versions of JVM, the ReentrantLock's implementation had much better through-put than synchronized keyword had. If or how the implementation differs is dependent on the JVM implementation/version.

通常，如果您不需要类ReentrantLock提供的其他功能，通常我建议使用synchronized关键字.但这最终是一种偏爱.

In general, I tend to recommend to use the synchronized keyword if you don't require additional features the class ReentrantLock provides. But this is ultimately a preference.

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