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.

This post explains how to use variables in Java. Learn the primitive types (and what that means) and just why variables are so important for any coding!

Writing Java Code: Classes, Methods and Variables Java is an object-oriented language, which means all code is associated with a class of objects.

Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.