Checking Account Management System

This Java application implements a checking account management system with a graphical user interface. It demonstrates the use of object-oriented programming principles, inheritance, and GUI development in Java.

Features

• Create and manage multiple checking accounts
• Perform transactions: deposits (checks and cash) and withdrawals
• Calculate and apply service charges based on account balance and transaction type
• Display account information and transaction history
• Save and load account data to/from files

Key Components

• CheckingAccount class: Represents individual checking accounts
• CheckOptionFrame class: Provides the main GUI interface
• Vector data structure to store multiple accounts
• File I/O for data persistence

How to Use

1. Run the application
2. Use the GUI to:
   • Add new accounts
   • Select existing accounts
   • Perform transactions (deposits and withdrawals)
   • View account details and transaction history
   • Save or load account data

Technical Highlights

• Object-Oriented Design: Utilizes classes and objects to model real-world entities
• Inheritance: Likely used in the CheckingAccount class hierarchy (not visible in Main.java)
• GUI Development: Uses Swing components (JFrame, JTextArea, JOptionPane) for the user interface
• File Handling: Implements methods to save and load account data
• Collections: Uses Vector to store and manage multiple accounts
• Exception Handling: Implements try-catch blocks for file operations and user input

Requirements

• Java Development Kit (JDK)
• Java Swing library (included in standard JDK)

This application serves as a practical example of applying various Java programming concepts in a real-world scenario of managing checking accounts.