Question 2 Next you will need to create classes to implement the interface and extend the abstract class, respectively. Create a Circle class that extends AbstractShape. Create the following: • A private double instance variablem radius. • A constructor that takes two parameters (in the order of color, radius). It should use the parameter for radius to set the m_radius instance variable and then explicitly call the parent class constructor using the super keyword and pass in the color parameter. • A method that concretizes the calcArea method of the abstract parent class and calculates the area of the circle. The area of a circle can be calculated as 3.14 x p² (where r is the radius). • A method that concretizes the calcPerimeter method of the abstract parent class and calculates the perimeter of the circle. The perimeter of a circle can be calculated as 2 x 3.14 x r (where r is the radius). Create a Rectangle class that implements the ShapeInterface. Create the following: • A private string instance variable m color. • Two private double instance variables m width and m length. • A constructor that takes three parameters (in the order of color, width, length) and sets them accordingly. • A method that concretizes the calcArea method and calculates the area of the rectangle. The area of a rectangle can be calculated as width x height. - A method that concretizes the calcPerimeter method and calculates the perimeter of the rectangle. The perimeter of a rectangle can be calculated as 2 x (width + height). Don't forget to create a test driver to verify your implementation!
Question 2 Next you will need to create classes to implement the interface and extend the abstract class, respectively. Create a Circle class that extends AbstractShape. Create the following: • A private double instance variablem radius. • A constructor that takes two parameters (in the order of color, radius). It should use the parameter for radius to set the m_radius instance variable and then explicitly call the parent class constructor using the super keyword and pass in the color parameter. • A method that concretizes the calcArea method of the abstract parent class and calculates the area of the circle. The area of a circle can be calculated as 3.14 x p² (where r is the radius). • A method that concretizes the calcPerimeter method of the abstract parent class and calculates the perimeter of the circle. The perimeter of a circle can be calculated as 2 x 3.14 x r (where r is the radius). Create a Rectangle class that implements the ShapeInterface. Create the following: • A private string instance variable m color. • Two private double instance variables m width and m length. • A constructor that takes three parameters (in the order of color, width, length) and sets them accordingly. • A method that concretizes the calcArea method and calculates the area of the rectangle. The area of a rectangle can be calculated as width x height. - A method that concretizes the calcPerimeter method and calculates the perimeter of the rectangle. The perimeter of a rectangle can be calculated as 2 x (width + height). Don't forget to create a test driver to verify your implementation!
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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Transcribed Image Text:Question 2 Next you will need to create classes to implement the interface and extend the
abstract class, respectively.
Create a Circle class that extends AbstractShape. Create the following.
• A private double instance variable m radius.
• A constructor that takes two parameters (in the order of color, radius). It should use the
parameter for radius to set the m radius instance variable and then explicitly call the parent
class constructor using the super keyword and pass in the color parameter.
• A method that concretizes the calcArea method of the abstract parent class and calculates
the area of the circle. The area of a circle can be calculated as 3.14 x (where r is the radius).
•A method that concretizes the calcPerimeter method of the abstract parent class and
calculates the perimeter of the circle. The perimeter of a circle can be calculated as 2 x 3.14 x r
(where r is the radius).
Create a Rectangle class that implements the ShapeInterface. Create the following:
A private String instance variable m color.
• Two private double instance variables m width and m length.
• A constructor that takes three parameters (in the order of color, width, length) and sets them
accordingly.
•A method that concretizes the calcArea method and calculates the area of the rectangle. The
area of a rectangle can be calculated as width x height.
•A method that concretizes the calcPerimeter method and calculates the perimeter of the
rectangle. The perimeter of a rectangle can be calculated as 2 x (width + height).
Don't forget to create a test driver to verify your implementation!
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