There are numerous examples of online forums and blogs discussing the differences between interfaces and abstract classes in Java.

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 ...