Chapter 9, Problem 3PE

Program Plan Intro

Implementation of CheckingAccount class

Program plan:

Filename: “BankAccount.java”

This program file is used to define a class “BankAccount”. In the code,

• Define a class “BankAccount”.
  • Declare a class variable “balance”.
  • Define a constructor “BankAccount()”.
    • Initialize the “balance” as 0
  • Define a method “deposit()”.
    • Set the value of “balance”.
  • Define a method “withdraw()”.
    • Set the value of “balance”.
  • Define a method “getBalance()”.
    • Return the value of “balance”.

Filename: “CheckingAccount.java”

This program file is used to define a class “CheckingAccount” as extending from “BankAccount”. In the code,

• Define a class “CheckingAccount”.
  • Declare the member variables “withdrawals” and “overdraft”.
  • Define a constructor “CheckingAccount()”.
    • Initialize the class members.
  • Define a method “withdraw()”.
    • Set the values of the variables.
    • Increment the value of “withdrawals” by 1.
    • If the value of “withdrawals” is greater than “FREE_WITHDRAWALS”.
      • Call the method “withdraw()”.
      • If the condition is true,
        • Add the value of “OVERDRAFT_FEE” to “amount”.
      • If the condition is false,
        • Add the value of “FIRST_OVERDRAFT_FEE” to “amount”.
        • • Call the method “withdraw()” of super class.
          • Define a method “monthEnd()”.
            • Set the values of the member variables “withdrawals” and “overdraft”.

Filename: “CheckingAccountTester.java”

This program file is used to define a class “CheckingAccountTester” to test the class “CheckingAccount”. In the code,

• Define a class “CheckingAccountTester”.
  • Define a method “main()”.
  • Declare an object of “CheckingAccount()”.
  • Call the method “deposit()”.
  • Call the method “getBalance()” and print the value.
  • Print the expected value.
  • Call the method “withdraw()”.
  • Call the method “getBalance()” and print the value.
  • Print the expected value.
  • Call the method “withdraw()”.
  • Call the method “getBalance()” and print the value.
  • Print the expected value.
  • Call the method “withdraw()”.
  • Call the method “getBalance()” and print the value.
  • Print the expected value.
  • Call the method “withdraw()”.
  • Call the method “getBalance()” and print the value.
  • Print the expected value.
  • Call the method “monthEnd()”.
  • Call the method “deposit()”.
  • Call the method “getBalance()” and print the value.
  • Print the expected value.
  • Call the method “withdraw()”.
  • Call the method “getBalance()” and print the value.
  • Print the expected value.