Chapter 8, Problem 2PP

Program Plan Intro

Date

Program plan:

Filename: “Date.java”

• Include the required header files.
• Define the “Date” class
  • Declare the required integer private variables.
  • Define the constructor.
    • Call the “super” method.
    • Set the day, month, and year.
  • Define the “addDays” method.
    • Return the day by forward in time by the given number of days.
  • Define the “addWeeks” method.
    • Calculate the weeks.
    • Check the “day” is greater than 31.
      • Calculate the difference in date.
      • Increment the month
      • Set the day
  • Define the “daysTo” method.
    • Declare the required variables.
    • Call the “getDay” method and store the result in “day1” variable.
    • Call the “getMonth” method and store the result in “month1” variable.
    • Call the “getYear” method and store the result in “year1” variable.
    • Check the “year1” is greater than “year”
      • Calculate the difference in years
      • Check the “month1” is greater than “month”
        • Calculate the difference in months
      • Otherwise, Calculate the difference in months
      • Check the “day1” is greater than “day”
        • Calculate the difference in days
      • Otherwise, Calculate the difference in days.
      • Return the result.
        • • Otherwise,
            • Calculate the difference in years
            • Check the “month1” is greater than “month”
              • Calculate the difference in months
            • Otherwise, Calculate the difference in months
            • Check the “day1” is greater than “day”
              • Calculate the difference in days
            • Otherwise, Calculate the difference in days.
            • Return the result.
  • Define the “getDay” method
    • Return the day
  • Define the “setDay” method
    • Set the day
  • Define the “getMonth” method
    • Return the month
  • Define the “setMonth” method
    • Set the month.
  • Define the “getYear” method
    • Return the year
  • Define the “setYear” method
    • Set the Year.
  • Define the “isLeapYear” method
    • Set the “isLeap” is false
    • Check the “year” mod 400 is 0
      • Set the “isLeap” is true
        • • Check the “year” mod 100 is 0
            • Set the “isLeap” is false
          • Check the “year” mod 4 is 0
            • Set the “isLeap” is true
          • Otherwise, set the “isLeap” is false.
          • Return the result.
  • Define the “toString” method
    • Return the year, month, and day.

Filename: “Test.java”

• Define the “Test” class.
  • Define the main method.
    • Create an object for “Date” class
    • Call the “toString” method and display the year, month, and day.
    • Call the “addDays” method with an argument as 5.
    • Call the “toString” method and display the year, month, and day.
    • Call the “addWeeks” method with an argument as 2.
    • Call the “toString” method and display the year, month, and day.
    • Create an object for “Date” class
    • Call the “daysTo” method and display the result.