Chapter 8, Problem 12PE

Program Plan Intro

Volume and Surface area

Program plan:

Filename: “Cone.java”

This code snippet creates a class “Cone”. In the code,

• Define a class “Cone”.
  • Declare the class variables “radius” and “height”.
  • Define the constructor “Cone”.
    • Set the values of class members.
  • Define the method “getVolume()”.
    • Calculate the volume of cone and return the value.
  • Define the method “getSurface()”.
    • Calculate the surface area and return the value.

Filename: “Cylinder.java”

This code snippet creates a class “Cylinder”. In the code,

• Define a class “Cylinder”.
  • Declare the class variables “radius” and “height”.
  • Define the constructor “Cylinder”.
    • Set the values of class members.
  • Define the method “getVolume()”.
    • Calculate the volume of cone and return the value.
  • Define the method “getSurface()”.
    • Calculate the surface area and return the value.

Filename: “Sphere.java”

This code snippet creates a class “Sphere”. In the code,

• Define a class “Sphere”.
  • Declare the class variables “radius”.
  • Define the constructor “Sphere”.
    • Set the values of class member.
  • Define the method “getVolume()”.
    • Calculate the volume of cone and return the value.
  • Define the method “getSurface()”.
    • Calculate the surface area and return the value.

Filename: “GeometryDemo.java”

This code snippet creates a class “GeometryDemo”. In the code,

• Import the required packages.
• Define a class “GeometryDemo”.
  • Define the “main” method.
    • Define the object of class “Scanner”.
    • Prompt the user to enter the radius.
    • Scan for “radius”.
    • Prompt the user to enter the height.
    • Scan for “height”.
    • Define the object of class “Sphere”.
    • Define the object of class “Cone”.
    • Define the object of class “Cylinder”.
    • Call the method “getVolime()” to print the volume of sphere.
    • Call the method “getSurface()” to print the surface area of sphere.
    • Call the method “getVolime()” to print the volume of cylinder.
    • Call the method “getSurface()” to print the surface area of cylinder.
    • Call the method “getVolime()” to print the volume of cone.
    • Call the method “getSurface()” to print the surface area of cone.