Chapter 14, Problem 2AW

Program Plan Intro

Circle class:

• The “Circle” class is used to draws a circle by its center point located at a particular coordinate, and with a specified radius.
• This class consists of five types of constructor.
  • “Circle()”:
    • This constructor creates an empty circle.
    • User can specify the center point for circle using the “setCenterX” and “setCenterY” methods.
    • Using “setRadius” method user can create the circle radius.
    • Using “setFill” method user can fill a color for the circle.
  • “Circle(radius)”:
    • This constructor takes “double” argument.
    • It is used to create a circle of specified radius.
    • User can specify the center point for circle using the “setCenterX” and “setCenterY” methods.
    • Using “setFill” method user can fill a color for the circle.
  • “Circle(centerX, centerY, radius)”:
    • This constructor takes three arguments as “doubles”.
    • This constructor creates a circle using a center point and a particular radius.
    • In this constructor, the circle is filled with the black color by default.
    • Using “setFill” method user can fill a different color for the circle.
  • “Circle(centerX, centerY, radius, fill)”:
    • This constructor is used to create a circle using a center point, radius and fill with a color.
    • In this constructor, the three arguments “centerX”, “centerY” and “radius” takes the value as a “double”.
    • The “fill” argument is an object of “Paint” class.
  • “Circle(radius, fill)”:
    • This constructor is used to create a circle using a radius and fill with a color.
    • In this constructor, “radius” argument is a “double” and the “fill” argument is an object of “Paint” class.

Example:

The example for creating “Circle” class is shown below:

Circle exampleCircle = new Circle(85, 120, 60);

Here,

• The “exampleCircle” is the object of “Circle” class.
• The above code creates a circle with its center point at the “(85, 120)” and a radius of “60”.