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In an n-sided regular polygon, all sides have
the same length and all angles have the same degree (i.e., the polygon is both equilateral
and equiangular). Design a class named RegularPolygon that contains:
■■ A private int data field named n that defines the number of sides in the polygon with default value 3.
■■ A private double data field named side that stores the length of the side with
default value 1.
■■ A private double data field named x that defines the x-coordinate of the polygon’s
center with default value 0.
■■ A private double data field named y that defines the y-coordinate of the polygon’s
center with default value 0.
■■ A no-arg constructor that creates a regular polygon with default values.
■■ A constructor that creates a regular polygon with the specified number of sides
and length of side, centered at (0, 0).
■■ A constructor that creates a regular polygon with the specified number of sides,
length of side, and x- and y-coordinates.
■■ The accessor and mutator methods for all data fields.
■■ The method getPerimeter() that returns the perimeter of the polygon.
■■ The method getArea() that returns the area of the polygon. The formula for
computing the area of a regular polygon is given below
Draw the UML diagram for the class then implement the class. Write a test program
that creates three RegularPolygon objects, created using the no-arg constructor,
using RegularPolygon(6, 4), and using RegularPolygon(10, 4,
5.6, 7.8). For each object, display its perimeter and area.
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