Chapter 12, Problem 6PE

Program Plan Intro

  Modified implementation of the classes in the ATM simulation

Program plan:

• In the file “BankAccount.java”, create a class “BankAccount”,
  • Declare the variable.
  • Define the constructor to create a bank account with “0” balance.
  • Define the parameterized constructor to create a bank account with a given balance.
  • Define the method “deposit()” to credit amount into the bank account.
  • Define the method “withdraw()” to debit amount from the bank account.
  • Define the method “getBalance()” to get the current balance of the bank account.
• In the file “Customer.java”, create a class “Customer”,
  • Define the constructor to construct a customer with a given number and PIN.
  • Define the method “match()” to check if this customer matches a customer number and PIN.
  • Define the method “getCheckingAccount()” to get the checking account of this customer  .
  • Define the method “getSavingsAccount()” to get the savings account of this customer.
• In the file “Bank.java”, import necessary packages, and create a class “Bank”,
  • Declare the necessary array lists.
  • Define the constructor to construct a bank with no customers and no accounts.
  • Define the method “readCustomers()” to read the customer numbers and pins and initializes the bank accounts.
  • Define the method “findCustomer()” to find a customer in the bank.
• In the file “ATM.java”, create a class “ATM”,
  • Declare and initialize necessary variables.
  • Define the constructor to construct an ATM for a given bank.
  • Define the method “reset()” to reset the ATM to the initial state.
  • Define the method “setCustomerNumber()” to set the current customer number and sets state to PIN.
  • Define the method “selectCustomer()” to find customer in bank. If found sets state to ACCOUNT, else to START.
  • Define the method “selectAccount()” to set current account to checking or savings. Set state to TRANSACT.
  • Define the method “withdraw()” to withdraw amount from current account.
  • Define the method “deposit()” to deposit amount to current account.
  • Define the method “getBalance()” to get the balance of the current account.
  • Define the method “back()” to moves back to the previous state.
  • Define the method “getState()” to get the current state of this ATM.
• In the file “ATMSimulator.java”, import necessary packages, and create a class “ATMSimulator”,
  • Define the method “main()”,
    • Execute “try” statement to handle exception if any,
      • Crate an object for “Bank”.
      • Call the method “readCustomers” to read the input file.
      • Create “ATM” object.
    • Catch and handle the exception if any.
    • Create “Scanner” class.
    • Execute the following or true,
      • If it is START state, get the customer number.
      • Otherwise, If it is PIN state, get the pin.
      • Otherwise, if it is ACCOUNT state, get the type of account.
      • Otherwise, if it is TRANSAC state, perform the type of transaction.