Chapter 7, Problem 12PC

Program Plan Intro

1994 Gas Prices

Program Plan:

GasWeek.java:

• Declare the class “GasWeek”.
  • Declare required variables.
  • Declare the constructor.
    • Initialize the variables with the values.
  • Give the accessor methods to get the week number, month, and price.

Main.java:

• Import the required packages.
• Declare the class “Main”.
  • Declare an array to store the month names.
  • Declare the “main ()” method.
    •  Declare required variables.
    • Create an array list.
    • Open the file.
    • Set the current month index value to the variable “currentMonth”.
    • Read the file using “while” condition.
      • Get the string.
      • Increment the value of “weekcount”.
      • Add the value to the array list.
    • Close the file.
    • Call the function “displayLowestPrice ()” to display the lowest price value.
    • Call the function “displayHighestPrice ()” to display the highest price value.
    • Call the function “displayAveragePrice ()” to display the average price value.
  • Give function definition for “displayLowestPrice ()”.
    • Create an object for the class.
    • Loop through the array list.
      • Check if the price is low.
        • Set the lowest price.
    • Print the value.
  • Give function definition for “displayHighestPrice ()”.
    • Create an object for the class.
    • Loop through the array list.
      • Check if the price is high.
        • Set the highest price.
    • Print the value.
  • Give function definition for “displayAveragePrice ()”.
    • Declare required variables.
    • Get the current month.
    • Loop through the array list.
      • Create an object for the class.
      • Increment the counter variable.
      • Check if the month is a current month
        • Calculate the total price.
      • Else,
        • Calculate average.
        • Print the average value.
        • Assign 0 to “count” and “total”.
        • Assign “g.getMonth ()” to “currentMonth”.