Read-write Locks

Summary

Explicit Locks offer an extended feature set compared to intrinsic locking, including greater flexibility in dealing with lock unavailability and greater control over queueing behavior. But ReentrantLock is not a blanket substitute for synchronized; use it only when you need features that synchronized lacks.

Read-write locks allow multiple readers to access a guarded object concurrently, offering the potential for improved scalability when accessing read-mostly data structures.