Abdulmehad / ATM-Machine

Java ATM System

Overview:

This repository contains a Java program that simulates a basic ATM system. The program includes classes for creating savings and checking accounts, performing deposits, withdrawals, and checking account balances. The purpose of this project is to provide a simple example of object-oriented programming in Java.

Classes and Interfaces:

1. bankaccount (Abstract Class):

   • Abstract class representing a generic bank account.
   • Contains attributes like accountno, accountholdername, and balance.
   • Abstract methods deposit and withdraw to be implemented by subclasses.

2. savingaccount (Class extending bankaccount):

   • Represents a savings account.
   • Inherits from bankaccount and implements the abstract methods.
   • Has an additional attribute interestrate and overrides the withdraw method.

3. checkingaccount (Class extending bankaccount):

   • Represents a checking account.
   • Inherits from bankaccount and implements the abstract methods.
   • Has an additional attribute overdraftlimit and overrides the withdraw method.

4. atmtransaction (Interface):

   • An interface defining methods for ATM transactions - withdraw, deposit, and checkbalance.

5. atm (Class implementing atmtransaction):

   • Represents the ATM system.
   • Implements methods for account management, withdrawal, deposit, and checking balance.
   • Maintains an ArrayList of bankaccount objects.

6. ATMmain (Main Class):

   • Contains the main method to execute the ATM program.
   • Creates an instance of the atm class and initializes sample saving and checking accounts.
   • Provides a user interface for creating accounts and performing transactions.

Usage:

1. Creating Accounts:

   • Choose between saving and checking accounts.
   • Enter account holder's name.

2. Managing Accounts:

   • Deposit funds into an account.
   • Withdraw funds from an account.
   • Check the account balance.

3. ATM Operation:

   • The ATM class provides a text-based menu for users to interact with their accounts.

4. Error Handling:

   • The program includes basic error handling for invalid inputs.

Running the Program:

1. Compile:

   • Compile the Java program using a Java compiler.

2. Run:

   • Run the compiled program.

3. Follow On-Screen Instructions:

   • Interact with the program by following the on-screen instructions.

Notes:

• The program uses a simple random number generator to assign account numbers.
• It includes a basic exception handling mechanism for unexpected input.

Disclaimer:

This program is a simplified simulation for educational purposes and may not represent real-world banking systems. Use it at your own risk.

License:

This project is licensed under the MIT License. Feel free to use, modify, and distribute the code.