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!

Java supports three types of variables, local, instance and static. This post explains the difference between a local, instance and static variable in Java ...

In order to add such a feature, you need to understand how Java controls data. Developers use variables in Java to hold data, with all variables having a data type and a name.