Abstract classes and abstract methods in java|#JavaBeam|Core Java Interview Q&A

Abstract classes and methods in java|#JavaBeam|Core Java Interview Q&A

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. When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class.

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