How Do You Use CountDownLatch in a Scenario? | Java Synchronization Explained — IT Interview Guide

How Do You Use CountDownLatch in a Scenario? | Java Synchronization Explained

In the world of multithreading and concurrent programming, ensuring proper synchronization between threads is a critical challenge. Java provides several utilities to help developers handle these situations efficiently. One such utility is the CountDownLatch class, which is part of the java.util.concurrent package. The CountDownLatch allows threads to wait for other threads to finish their tasks before they proceed, making it an invaluable tool for synchronization.

This guide will walk you through the concept of CountDownLatch, its use cases, and how you can implement it in various scenarios with appropriate code examples. By the end of this guide, you'll understand how to use CountDownLatch to synchronize tasks in a multithreaded environment.

What Is CountDownLatch?

A CountDownLatch is a synchronization aid that allows one or more threads to wait until a set of operations being performed by other threads is completed. It maintains an internal counter, which is decremented each time a thread calls countDown(). Once the counter reaches zero, the threads that are…