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.

Through a simple example, this article investigates the design decisions driving the use of interfaces and abstract classes and shows why interfaces satisfy type concerns and abstract classes ...

What does abstract class actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

Given the reader interface, you can now use other classes - even ones outside the data class hierarchy - as readers, as long as they support the reader interface. Using the abstract reader interface ...