Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

As you learned in my recent introduction to programming with classes and objects, you initialize an object via the code that you place in a class’s constructor.

What are classes in Java? If you’re not familiar with the concept of object-oriented programming, this is the best place to start. If you already know what a class is and just want to learn Java ...

The classes are added if missing, and removed if already set — this creates a toggle effect. However, by using the “switch” parameter, you can specify only to remove or only to add a class.