Question 1 In this question, you need to create an interface and an abstract class. For the interface, name it ShapeInterface and create the following methods: • An abstract method named calsarea that returns a douhle

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
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Question 1 In this question, you need to create an interface and an abstract class. For the
interface, name it ShapeInterface and create the following methods:
An abstract method named calcArea that returns a double.
• An abstract method named calcPerimeter that returns a double.
• An abstract method that overrides the toString method.
For the abstract class, name it AbstractShape and create the following methods:
• A private String instance variable m_color.
• A constructor that takes one parameter of type String and sets the instance variable
accordingly.
• A getter method getColor that returns a String.
• An abstract method named calcArea.
• An abstract method named calcPerimete.
• An abstract method that overrides the toString method (Hint: Explicitly declare this
method as public).
Transcribed Image Text:Question 1 In this question, you need to create an interface and an abstract class. For the interface, name it ShapeInterface and create the following methods: An abstract method named calcArea that returns a double. • An abstract method named calcPerimeter that returns a double. • An abstract method that overrides the toString method. For the abstract class, name it AbstractShape and create the following methods: • A private String instance variable m_color. • A constructor that takes one parameter of type String and sets the instance variable accordingly. • A getter method getColor that returns a String. • An abstract method named calcArea. • An abstract method named calcPerimete. • An abstract method that overrides the toString method (Hint: Explicitly declare this method as public).
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