In order to qualify as a subclass of an abstract class, a class must offer concrete implementations for all of the abstract methods defined in the abstract parent class. Exactly how do you feel about this?

In order to qualify as a subclass of an abstract class, a class must offer concrete implementations for all of the abstract methods defined in the abstract parent class. Exactly how do you feel about this?

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter11: Advanced Inheritance Concepts

Section: Chapter Questions

Problem 19RQ

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Question

In order to qualify as a subclass of an abstract class, a class
must offer concrete implementations for all of the abstract
methods defined in the abstract parent class. Exactly how do
you feel about this?

Expert Solution

Step 1

Introduction:

In computers, abstract type in programming languages is a non-navigable type in a nominative type system. Directly instantiated; a concrete type is a type that can be directly instantiated. Every instance of an abstract class is a concrete subtype instance.

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