The Bank of Banks 🏦

A Java-based banking system simulation that demonstrates object-oriented programming principles and clean architecture.

Project Overview

The Bank of Banks is a console application that simulates basic banking operations including:

• Client management (CRUD operations)
• Account management (Current and Savings accounts)
• Banking operations (deposits, withdrawals, transfers)
• Interest calculations for savings accounts
• Overdraft facility for current accounts

Technologies Used

• Java 21
• Maven
• JUnit 5
• Mockito

Key Features

• Builder Pattern for object creation
• Repository Pattern for data access
• Interface segregation
• Clean Architecture principles
• Input validation
• Error handling
• Unit testing

Getting Started

Prerequisites

• Java 21 or higher
• Maven

Installation

1. Clone the repository

git clone https://github.com/yourusername/TheBankOfBanks.git

2. Build the project

mvn clean install

2. Run the application

mvn exec:java

Running Tests

mvn test

Project Highlights

• ✨ Robust Input Validation

  • CPF format verification
  • Numeric input handling
  • Date format validation
  • Empty input prevention

• 🎯 Clean Code Principles

  • Single Responsibility Principle
  • Interface Segregation
  • Meaningful naming conventions

• 🏗️ Design Patterns

  • Builder pattern for object creation
  • Repository pattern for data access
  • Command pattern for menu operations

• 🧪 Comprehensive Testing

  • Unit tests with JUnit 5
  • Mock objects with Mockito