Chapter 9, Problem 9E

Program Plan Intro

Design of “MinMaxAccount”

Program plan:

• Create a class “MinMaxAccount” that extends the class “BankAccount”,
  • Declare the necessary variables.
  • Define the constructor of its own class,
    • Call the super class constructor using “super” keyword.
    • Assign the minimum value returned from the method “getBalance()”.
    • Assign the maximum value returned from the method “getBalance()”.
  • Define the method “debit()” method to record the given debit,
    • Call the super class method “debit()”.
    • Call the method “updateMin_Max()”.
  • Define the method “credit()” method to record the given credit,
    • Call the super class method “credit()”.
    • Call the method “updateMin_Max()”.
  • Define the method “updateMin_Max()”,
    • Assign the value returned from the method “getBalance()”.
    • Check whether the balance is less than the minimum balance,
      • If it is true, set the balance as minimum balance.
        • Otherwise, check whether the balance is greater than the maximum balance,
        • • If it is true, set the balance as maximum balance.
  • Define the method “getMin()”,
    • Return the minimum balance.
  • Define the method “getMax()”,
    • Return the maximum balance.