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.

An abstract class is a template definition of methods and variables in a specific class, or category of objects. In programming, objects are units of code, ... Abstract classes are used in all ...

What is an Abstract Class? An abstract class is a class that is declared abstract —it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed. An ...