Chapter 4, Problem 6PE

Program Plan Intro

Calculate the area and diameter of Circle

Program plan:

Filename: “Circle.java”

• Define the “Cirle” class
  • Declare the required variables.
  • Define constructor
    • Set the radius value as 1.
    • Call the “calc” method.
  • Define the “setRadius” method
    • Set the value
    • Call the “calc” method
  • Define the “getRadius” method
    • Return the radius
  • Define the “getDiameter” method
    • Return the diameter
  • Define the “getArea” method
    • Return the area
  • Define the “calc” method
    • Calculate the diameter of the circle
    • Calculate the area of the circle.

Filename: “TestCircle.java”

• Define the “TestCircle” class
  • Define the main method.
    • Create the objects for “Circle” class
    • Call the “setRadius” method with different values
    • Call the “display” method
  • Define the “display” method
    • Display the radius, diameter, and area of the circle.