The Power of Multithreading and Concurrency in Java — Part 2

Welcome back to Part 2 of our blog series on multithreading and concurrency in Java. In Part 1, we explored the basics of multithreading and the ExecutorService for efficient task execution. In this second part, we will delve into advanced synchronization mechanisms, coordination utilities, and the powerful ForkJoinPool framework for parallel processing. Let's get started!

Fine-Grained Synchronization with ReentrantLock

While the synchronized keyword provides a convenient way to synchronize code blocks, it has its limitations. Java offers the ReentrantLock class in the java.util.concurrent.locks package, which provides advanced locking mechanisms beyond what synchronized blocks offer.

Reentrant Nature

The name “ReentrantLock” stems from its reentrant nature. Unlike synchronized blocks, a thread can acquire a ReentrantLock multiple times without getting blocked. This allows for nested locking, where a thread that already holds the lock can reacquire it, preventing other threads from accessing the locked resource until the lock is released the same number of times it was acquired.

import java.util.concurrent.locks.ReentrantLock;

public class ReentrantLockExample {
    private static final…