Java multithreaded concurrent programming (mutex reentrant lock)

There are two types of locks in Java:

The lock obtained through the keyword synchronized is called a synchronous lock. In the previous article, we introduced the synchronized keyword of Java multithreaded concurrent programming. java. util. Locks in concurrent (JUC) packages, such as reentrantlock (mutual exclusion lock) implemented by inheriting interface lock, and reentrantreadwritelock (read-write lock) implemented by inheriting readwritelock. This article mainly introduces reentrantlock (mutual exclusion lock).