Java multithreading synchronized the basis for synchronization

Synchronized the basis for synchronization is that every object in Java can be used as a lock. It is shown in the following 3 ways:

1 for the normal synchronization method, the lock is the current instance object.

2 for the static synchronization method, the lock is the class object of the current classes.

3 for a synchronous method block, the lock is an object inside the synchronized bracket.

When a thread tries to access a synchronous block of code, it first gets the lock and then exits or throws an exception when the lock is released.

Resources

"The Art of Java concurrent Programming" The realization principle and application of 2.2 synchronized

Java multithreading synchronized the basis for synchronization