Chapter 21, Problem 6PP

Program Plan Intro

Implementation of a Graphical User Interface (GUI)

Program plan:

• In a file “BankAccount.java”, create a class “BankAccount”,
  • Declare the necessary variables.
  • Define the constructor to create a bank account with “0” balance.
  • Define the constructor to create a bank account with a specified balance.
  • Define the method “getAccountNumber()” to return the account number.
  • Define the method “deposit()” deposit the amount into the bank account.
  • Define the method “withdraw()” to debit the amount from the bank account.
  • Define the method “getBalance()” to return the bank balance.
• In a file “BankData.java”, import the packages and create a class “BankData”,
  • Declare the object variable.
  • Define the constructor to create a “BankData” object.
  • Define the method “open()” to open the data file.
  • Define the method “size()” to return the number of accounts in the file.
  • Define the method “close()” to close the data file..
  • Define the method “read()” to read the savings account records.
  • Define the method “find()” to search the position of a bank account with a given number.
  • Define the method “write()” to write the savings account record to the data file.
• In a file “BankSimulatorFrame.java”, import necessary packages, and create a class “BankSimulatorFrame”,
  • Declare and initialize the necessary static variables.
  • Declare the necessary variables.
  • Define the constructor,
    • Create an object for “BankData”.
    • Call the method “setLayout()”.
    • Call the method “add()” to add the various panel.
    • Call the method “setSize()” to set the frame size.
      • Define the method “createLoadPanel()”,
        • Create a panel.
        • Create a button “Load”.
        • Add the button into the panel.
        • Create Listener class for the button,
        • • Define the method “actionPerformed()”,
            • Create “JFileChooser” object.
              • Check the condition for the file chooser,
                • Execute try statement,
                  • Open the file
                  • Enable the buttons.
                • Catch if exception occurs.
        • Call the action listener method.
        • Return the panel.
      • Define the panel method “createFindPanel()”,
        • Create a panel.
        • Create a button “Find”.
        • Disable the button.
        • Add the button into the panel.
        • Create a button “add”.
        • Disable the button.
        • Add the button into the panel.
        • Create text field.
        • Add the text field into the panel.
        • Create a listener class for the buttons,
        • • Define the method “actionPerformed()”,
            • Execute try statement,
              • Get the account number.
              • Search the position of the account number.
              • Check the condition,
                • Display the message.
                • Disable the button.
              • Otherwise,
                • Read the current position.
                • Set the text for the label.
                • Enable the button.
            • Catch if “IOException” exception occurs.
            • Catch if “NumberFormatException” exception occurs.
        • Call the listener method.
        • Create a class for button listener,
        • • Define the method “actionPerformed()”,
            • Get the account number.
            • Search the position.
            • Check the condition,
              • Get the size.
              • Create a new account.
              • Call the method “write()”.
            • Otherwise,
              • Display the message.
              • Read the current position.
            • Set the text.
            • Enable the button.
          • Catch if “IOException” exception occurs.
          • Catch if “NumberFormatException” exception occurs.
        • Call the method action listener method.
        • Returns the panel.
      • Define the method “createBalancePanel()”,
        • Create a panel.
        • Create empty label.
        • Add the label into the panel.
        • Return the panel.
      • Define the method “createDepositPanel()”,
        • Create a panel.
        • Create a button “Deposit”.
        • Create and add the label into the panel.
        • Create and add the text field into the panel.
        • Add the button into the panel.
        • Create a listener class for the buttons,
        • • Define the method “actionPerformed()”,
            • Execute try statement,
              • Get the amount.
              • Call the method “deposit()”.
              • Call the method “write()”.
              • Set the text.
              • Enable the button.
            • Catch if “IOException” exception occurs.
            • Catch if “NumberFormatException” exception occurs.
        • Call the listener method.
        • Returns the panel.
• In a file “BankSimulatorViewer.java”, import necessary packages, and create a class “BankSimulatorViewer”,
  • Define the “main()” method.
    • Create “BankSimulatorFrame” object.
    • Call the method to define the frame operation.
    • Set the frame’s title.
    • Make the frame visible.