This post explains how to call a method in Java. Learn how to define methods, call them from other classes, and pass arguments!

Learn how to use synchronous and asynchronous callbacks in Java—including callbacks with lambda expressions, CompletableFuture, and more.

The entry point of a standalone Java application is the main method or function. In the age of Servlets and JSPs, Java’s main function took a backseat to these technologies that were initialized with ...

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

We discuss how to work with directories, sub-directories, and traverse them using Java and the DirectoryStream method. Learn more.