Have you used the ReentrantLock mechanism in your projects for thread management?

Yes, ReentrantLock is an implementation of a lock with re-entry capability, used to control access to shared resources in multithreaded applications.

Differences from synchronized:

• You can attempt to acquire the lock with a timeout or without blocking (tryLock).
• It allows more flexible lock management (for example, unlocking in another method).

Example of using ReentrantLock:

import java.util.concurrent.locks.ReentrantLock;

ReentrantLock lock = new ReentrantLock();

public void safeMethod() {
    lock.lock();
    try {
        // critical section
    } finally {
        lock.unlock();
    }
}

Used ReentrantLock for managing concurrent access when more flexibility was needed than what synchronized provides.