Big Java Late Objects
Big Java Late Objects
2nd Edition
ISBN: 9781119330455
Author: Horstmann
Publisher: WILEY
Question
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Chapter 9, Problem 10PE
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.

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Big Java Late Objects

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