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!

Here's everything you need to know about Java operators and operator types, and how to use them to write expressions for your Java programs.

The boxing and unboxing of Java primitive types has severe performance implications. Uncover the truth about autoboxing Java primitive types in this JDK Mission Control and JVM Flight Recorder example ...

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.

Null pointer exception is an “exception” (error) that is particularly common when programming in Java. For a beginner, this is a confusing and daunting message to receive, but it can be just ...