What is a reentrant lock in Java?

Can you explain what a reentrant lock is in Java?

A reentrant lock in Java is a synchronization aid that allows a thread to re-enter a lock it already holds.

How does it differ from a regular lock?

Unlike a regular lock, a reentrant lock allows the same thread to acquire the lock multiple times without causing a deadlock.

Can you give me an example of how to use a reentrant lock?

Sure! Here's a simple example:

ReentrantLock lock = new ReentrantLock();

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

What are the advantages of using a reentrant lock?

The main advantages include better control over thread synchronization and the ability to avoid deadlocks in recursive scenarios.