The software I use is Eclipse, please teach me how to write it on Eclipse.

2. In an n-sided regular polygon, all sides have 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 A private double data field named y that defines the y-coordinate of the polygon's center with default value O 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-coordinate and y-coordinate The accessor and mutator for all data fields. [accessors are the getters and mutators are the setters] . . 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 for a regular polygon is 4 x tan 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