Circle.java Program Plan: Include a class name named “Exercise_13_09”. Declare the main() method. Create three Circle objects and assign values to them using the Circle class. Display the radius of each circle object referencing Circle class. Display if circle 1 is equal to circle 2 or not referencing Circle class. Close the main() method. Close the class. Include an abstract class “GeometricObject”. Declare all the data types of the variables. Construct a default geometric object. Construct a geometric object with color and filled value. Assign color and fill to the object. Set a new color. Define an isFilled method returns filled and since filled is Boolean; the get method is named isFilled. Set a new filled and getDateCreated method. Override toString function to return output. Define Abstract method getArea. Define Abstract method getPerimeter. Close class. Include a class “Circle” that extends the class GeometricObject and implements Comparable. Declare radius variable. Create a Circle constructor. Assign values to radius. Create a function to set color and set fill in the Circle. Create a Function to return radius. Create a function to set a new radius. Create an override function to return area. Create an override function that returns true if objects radii are the same. Create an override function to implement compareTo method. Create a function that returns true if objects radii are the same. Close class.

Question

(Triangle class) Design a new Triangle class that extends the abstract GeometricObject class. Draw the UML diagram for the classes Triangle and GeometricObject and then implement the Triangle class. Write a test program that prompts the user to enter three sides of the triangle, a colour, and a Boolean value to indicate whether the triangle is filled. The program should create a Triangle object with these sides and set the colour and filled properties using the input. The program should display the area, perimeter, colour, and true or false to indicate whether it is filled or not.

Answer 1

Question

Chapter 13, Problem 13.9PE

Program Plan Intro

Circle.java

Program Plan:

Include a class name named “Exercise_13_09”.

Declare the main() method.

Create three Circle objects and assign values to them using the Circle class.

Display the radius of each circle object referencing Circle class.

Display if circle 1 is equal to circle 2 or not referencing Circle class.

Close the main() method.

Close the class.

Include an abstract class “GeometricObject”.

Declare all the data types of the variables.

Construct a default geometric object.

Construct a geometric object with color and filled value.

Assign color and fill to the object.

Set a new color.

Define an isFilled method returns filled and since filled is Boolean; the get method is named isFilled.

Set a new filled and getDateCreated method.

Override toString function to return output.

Define Abstract method getArea.

Define Abstract method getPerimeter.

Close class.

Include a class “Circle” that extends the class GeometricObject and implements Comparable.

Declare radius variable.

Create a Circle constructor.

Assign values to radius.

Create a function to set color and set fill in the Circle.

Create a Function to return radius.

Create a function to set a new radius.

Create an override function to return area.

Create an override function that returns true if objects radii are the same.

Create an override function to implement compareTo method.

Create a function that returns true if objects radii are the same.

Close class.

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