ATM Class System

A Java console-based ATM simulation built with multiple account classes and object-oriented design.

The program creates a set of accounts, lets the user choose an account by id, and supports checking balances, withdrawing, depositing, and viewing account information.

Features

• Creates multiple account objects
• Supports savings accounts and current accounts
• Allows deposits and withdrawals
• Enforces a minimum balance for savings accounts
• Supports overdraft behavior for current accounts
• Uses a menu loop so users can switch between accounts
• Includes a UML diagram for the class structure

Concepts Practiced

• Java
• Object-oriented programming
• Classes and objects
• Inheritance
• Method overriding
• ArrayList usage
• Menu-driven console programs
• UML/design planning

How to Run

Compile the Java files:

javac *.java

Run the ATM program:

java Atm

What I Learned

This project helped me understand how real-world systems can be modeled with related classes. It also helped me practice separating shared account behavior from specialized account rules.