Java interfaces are different from classes, and it’s important to know how to use their special properties in your Java programs. This tutorial introduces the difference between classes and ...

Create packages, import packaged classes and interfaces into your programs, move packages, and encapsulate them in jar files.

This post explains how to use classes in Java to build objects and organize your code. Also learn: constructors, static methods, and more!

Don't overcomplicate your classes. That's what SOLID's single responsibility principle in Java means. Here's an example of how to do SOLID right in Java.