Completable Future in Java: A Comprehensive Guide

Java has been around for over two decades, and it still remains one of the most popular programming languages in the world. One of the key features of Java is its ability to handle asynchronous programming with ease. The Completable Future API is one of the most powerful tools in Java’s arsenal for asynchronous programming. In this guide, we’ll explore what Completable Future is, how it works, and how it can be used to write better and more efficient code.

What is Completable Future in Java?

Completable Future is a Java API that was introduced in Java 8. It is designed to handle asynchronous tasks and provides a flexible and powerful framework for managing concurrent operations. Completable Future is part of the Java Concurrency API, which is a set of tools and classes that allow developers to create concurrent and parallel applications.

Completable Future is a class that represents a computation that can be completed asynchronously. It is similar to the Future class in Java, but with some added functionality. A Completable Future can be completed with a value or an exception, and it can also be used to combine multiple Completable Futures into a single result.

How does Completable Future work?

Completable Future works by allowing developers to define a task that will be completed asynchronously. This task can be any operation that takes time to complete, such as network I/O, file I/O, or computation. The task is then…