Chapter 11, Problem 3PC

Program Plan Intro

RetailItem Exception

Program Plan:

RetailItem.java:

• Declare the class “RetailItem”.
• Declare the private variable “desp” as “string”.
• Declare the private variable “units” as “int”.
• Declare the private variable “price” as “double”.
• Initialize the constructor “RetailItem”.
  • Assign “desp” as empty string.
  • Assign “units” as “0”.
  • Assign “price” as”0.0”.
• Initialize the parameterized constructor “RetailItem”.
  • Assign “desp” as “d”.
  • Assign “units” as “u”.
  • Assign “price” as “p”.
• Mutator function “setDesp()”
  • Assign “desp” to “d”.
• Mutator function “setUnits()”.
  • Check whether the “u” is greater than “0”
    • Throw the exception.
  • Otherwise, assign “u” to “units”.
• Mutator function “setPrice()”.
  • Check whether the “p” is greater than “0”
    • Throw the exception.
  • Otherwise, assign “p” to “price”.
• Define the accessor function “getDesp()”, “getUnits()” and “getPrice()”.

NegativeUnitsException.java:

• Definition for “NegativeUnitsException”
  • Definition for non-parameterized constructor.
    • Print the statement.
  • Definition for parameterized constructor
    • Print the statement.

NegativePriceException.java:

• Definition for “NegativePriceException”
  • Definition for non-parameterized constructor.
    • Print the statement.
  • Definition for parameterized constructor
    • Print the statement.

RetailDemo.java:

• Import the required packages.
• Definition for “RetailDemo” class.
• Definition for main class.
  • Declare the required variables.
  • Create an object for scanner class.
  • Create a retail item object.
  • Get the description from the user.
  • Set the item description.
  • Get the items units.
    • Inside the try block,
      • Set the item units.
      • Assign “true” to “input.”
    • Inside the catch block,
      • Print the error
      • Assign “false” to “input”.
  • Get the items price.
    • Inside the try block,
      • Set the item price.
      • Assign “true” to “input.”
    • Inside the catch block,
      • Print the error
      • Assign “false” to “input”.
  • Print the description, price and units of the item.