🏦 PinnacleBankCore

🚀 Production-Ready Core Java Console Banking System (OOP-Driven Design)

PinnacleBankCore is a fully menu-driven console banking application developed using pure Core Java, demonstrating enterprise-level OOP principles, custom exception handling, and clean layered architecture.

⚡ No frameworks. No databases. Pure Core Java fundamentals — Perfect for Java interviews, OOP mastery, and fresher portfolios.

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🎯 Project Objective

Build a scalable banking system showcasing:

• ✅ SOLID principles in action
• ✅ 7+ custom business exceptions
• ✅ Real-world banking logic (interest, min balance, daily limits)
• ✅ Professional console UI with formatted tables

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📱 Live Demo

--------------------- Main Menu ---------------------
1:Add Account 2:Display All 3:Search Account
4:Transaction 5:Update 6:Delete Account
7:Add Interest 8:Account Statement

Choose (1-8): 1
Customer ID: 101
Customer Name: Hitesh Mane
Account No: 123456
IFSC Code: SBIN0001234
Initial Balance (₹): 5000
Type (SAVINGS/CURRENT): SAVINGS
Interest Rate (%): 6.5

✅ Account created: Hitesh Mane

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🧠 Core Java Concepts Mastered

Concept	Implementation	Business Value
Inheritance	Account → SavingsAccount/CurrentAccount	Account hierarchy
Polymorphism	addInterestToAllAccounts()	Uniform processing
Abstraction	BankAccount interface + Account abstract	Clean contracts
Encapsulation	Private fields + validation	Data integrity
Collections	ArrayList<Customer>, List<Transaction>	Efficient storage
Exception Handling	7+ custom checked exceptions	Rule enforcement
Enums	AccountType, TransactionType	Type safety
Streams/Lambdas	Duplicate checks, searches	Modern Java

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⚙️ Production Features

Feature	Savings Account	Current Account	Status
Create Account	✅ ₹1000 min balance	✅ Business accounts	🟢 Complete
Deposit/Withdraw	✅ Transaction history	✅ Transaction history	🟢 Complete
Interest	✅ 6.5% monthly	❌ Zero interest	🟢 Complete
Search	ID/AccNo/Name	ID/AccNo/Name	🟢 Complete
Statement	Last N transactions	Last N transactions	🟢 Complete
Update	Name + Address	Name + Address	🟢 Complete
Delete	Balance=0 required	Balance=0 required	🟢 Complete

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🗂️ Enterprise Architecture

┌─────────────────┐      ┌──────────────────┐      ┌─────────────────┐
│    BankMain     │ ───▶ │   BankServices   │ ───▶ │     Customer    │
│   (Controller)  │      │ (Business Logic) │      │        ↕        │
└─────────────────┘      └──────────────────┘      │     Account     │
                                                   │        ↕        │
                                                   │   Transactions  │
                                                   │     Address     │
                                                   └─────────────────┘

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📁 Project Structure

PinnacleBankCore/
├── BankMain.java
├── service/
│   └── BankServices.java
├── model/
│   ├── entity/
│   │   ├── BankAccount.java
│   │   ├── Account.java
│   │   ├── SavingsAccount.java
│   │   ├── CurrentAccount.java
│   │   ├── Customer.java
│   │   ├── Transaction.java
│   │   └── Address.java
│   └── enums/
│       ├── AccountType.java
│       └── TransactionType.java
├── exceptions/
│   ├── AccountNotFoundException.java
│   ├── DuplicateAccountException.java
│   ├── InsufficientFundsException.java
│   ├── InvalidAmountException.java
│   ├── MinimumBalanceException.java
│   ├── DailyLimitExceededException.java
│   └── InvalidIFSCException.java
└── util/
    └── BankConstants.java

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🚨 Business Exceptions Enforced

❌ AccountNotFoundException(101)
❌ DuplicateAccountException(123456)
❌ InsufficientFundsException(5000.00/2000.00)
❌ InvalidAmountException(-100.00)
❌ MinimumBalanceException(500.00)
❌ DailyLimitExceededException()
❌ InvalidIFSCException(INVALID123)

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▶️ Quick Start

1. Clone the repository  
2. Open the project in **Eclipse / IntelliJ IDEA**  
3. Run `BankMain.java`  
4. Use the console menu to interact

🔧 Prerequisites

• JDK 17+
• Any Java IDE

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🎓 Perfect For

• ✅ Java Fresher Interviews
• ✅ OOP Concept Demonstration
• ✅ Core Java Portfolio
• ✅ Technical Round Preparation
• ✅ College Projects

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🚀 Production Enhancements Planned

• 📁 File Persistence (ObjectInputStream)
• 🔁 Account Transfers
• 🗄️ JDBC Integration (MySQL/PostgreSQL)
• 🧪 JUnit 5 Tests (95% coverage target)
• ⚡ Multithreading (concurrent transactions)

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👨‍💻 Author

Hitesh Mane Java Backend Developer | Pune, India

📧 hiteshmane5hm@gmail.com

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⭐ If you like this project, don't forget to star the repo!