Chapter 7, Problem 9PP

Program Plan Intro

Separate files for each Sale

Program plan:

Filename: “Sale.java”

• Include the required header files in the program
• Define the “Sale” class
  • Declare the private variables
  • Define the parameterized constructor
    • Set the value
  • Define the “getName” method
    • Return the name
  • Define the “getServiceCategory” method
    • Return the service
  • Define the “getAmount” method
    • Return the amount
  • Define the “getDate” method
    • Return the date

Filename: “SalesSales.java”

• Include the required header files in the program
• Define the “SalesSales” class
  • Define the “getFileName” method
    • Declare the variable
    • Get the filename from the user
    • Iterate the loop until the loop ends the last line in the file
      • Get the values
    • Return the value
  • Define the “readSaleEntry” method
    • Declare the variable and get the values
    • Separate the values using “;”
    • Declare the variables and get the values
    • Call the “Sale” class with the parameters and return the values
  • Define the “readSalesFile” method
    • Create an object for “ArrayList”
    • Check filename is not equal to null
    • In the “try” block, create an object for “Scanner” class
      • Iterate the loop until the loop ends the last line in the file
        • Add the values by calling the “readSaleEntry” method
    • Return the sales.
  • Define the “gatherCategories” method
    • Create an object for “ArrayList”
    • Iterate the values
      • Check the categories are not equal to 0
        • Add the values
    • Return the categories
  • Define the “writeSale” method
    • Call the “getName” method and display the name
    • Call the “getServiceCategory” method and display the category
    • Call the “getAmount” method and display the amount
    • Call the “getDate” method and display the date
  • Define the “writeCategorySalesToFile” method
    • In the “try” block, create an object for “PrintWriter” class
      • Iterate the values
        • Check the service category is equal to category
        • • Call the “writeSale” method
            • In the “catch” block, display a file not found error message
  • Define the “writeCategorySales” method
    • Iterate the values
      • Call the “writeCategorySalesToFile” method
  • Define the main method
    • Create an object for “Scanner” class
    • Call the “getFileName” method and set the value
    • In the “try” block,
      • Call the “readSalesFile” method and store the value in “sales” variable.
      • Call the “gatherCategories” method and store the value in “categories” variable.
      • Call the “writeCategorySales” method
      • Display the successive message
    • In the “catch” block, display a file not found error message
    • In the “catch” block, display a no such element error message