Answered: Abstraction is the basis for good…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Abstraction is the basis for good Object-Oriented design that is modular, reusable, and maintainable.

Interfaces and Abstract classes are two mechanisms in Java that provide high-level abstractions. An interface or abstract class is something which is not concrete, something which is incomplete.

what do you think is meant by “Programming to an interface”? What are some differences between Abstract Classes and Interfaces? Provide a simple example application with an interface definition and a class which implements the interface.

Expert Solution

Step 1: Programming to an interface

Interfaces may look like incomplete versions of abstract classes but they provide a flexible way of organizing classes.
It does not contain any concrete methods.
Programming to an interface is a technique to write classes based on an interface; it defines what the behavior of the object should be.
It includes creating an interface, defining the method, and then creating the actual class with the implementation.

Step 2: Differences between Abstract Classes and Interfaces

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