💰 Expense Tracker

A simple Java console-based application to record, manage, and analyze daily expenses using Object-Oriented Programming, File Handling, and Collections Framework.

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📖 Overview

Expense Tracker is a lightweight Java console application that helps users manage their daily expenses. It allows users to add expenses, view all recorded expenses, calculate the total expenditure, and generate category-wise summaries.

The application stores expense records locally in a text file, ensuring that data is available even after restarting the program.

This project was developed to strengthen Core Java concepts including Object-Oriented Programming, Collections Framework, File Handling, Exception Handling, and Java Time API.

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✨ Features

➕ Add Expense

• Add a new expense
• Category validation
• Positive amount validation
• Automatically stores the current date

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📋 View All Expenses

Displays all recorded expenses in a tabular format including:

• Category
• Amount
• Date

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💵 Total Expense

Calculates the total amount spent across all recorded expenses.

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📊 Category-wise Summary

Displays total expenses grouped by category using Java HashMap.

Example:

Food          : 1200.00
Travel        : 850.00
Shopping      : 1500.00

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💾 File Storage

• Saves all expenses into expenses.txt
• Automatically loads existing expenses when the application starts

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✅ Input Validation

• Prevents empty categories
• Prevents invalid numeric input
• Prevents negative or zero expense amounts
• Handles invalid menu choices gracefully

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🛠 Tech Stack

• Java
• Object-Oriented Programming (OOP)
• Collections Framework
• ArrayList
• HashMap
• File Handling
• Exception Handling
• Java Time API (LocalDate)
• BufferedReader / BufferedWriter

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📂 Project Structure

Expense-Tracker
│
├── src
│   └── com
│       └── expensetracker
│           ├── Expense.java
│           └── ExpenseTracker.java
│
├── expenses.txt
├── README.md
└── expense-tracker.png

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🚀 Getting Started

Clone Repository

git clone https://github.com/Jahnavi-Avadhuta/Expense-Tracker.git

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Open Project

Import the project into Eclipse, IntelliJ IDEA, or VS Code.

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Compile

javac Expense.java ExpenseTracker.java

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Run

java com.expensetracker.ExpenseTracker

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🎮 Menu

===== Expense Tracker Application =====

1. Add Expense
2. View All Expenses
3. View Total Expense
4. View Category-wise Total
5. Save & Exit

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📸 Preview

A project banner is included above.

Future versions will include console screenshots and GIF demonstrations.

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🚀 Future Enhancements

• Edit existing expenses
• Delete expenses
• Monthly reports
• Budget planning
• Expense filtering by date
• Export to CSV
• Charts and visual analytics
• GUI version using JavaFX or Swing
• Database integration using MySQL
• User authentication

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📚 Learning Outcomes

This project helped strengthen my understanding of:

• Object-Oriented Programming
• Collections Framework
• File Handling
• Exception Handling
• Java Time API
• Data Persistence
• Console Application Development
• Clean Code Practices

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👩‍💻 Developer

Jahnavi Avadhuta

Computer Science Graduate

Software Engineer | Java | Spring Boot | Python | AI & Data Science Enthusiast

🌐 Portfolio: YOUR_PORTFOLIO_URL

💼 LinkedIn: YOUR_LINKEDIN_URL

💻 GitHub: https://github.com/Jahnavi-Avadhuta

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⭐ Support

If you found this project useful, consider giving it a ⭐ on GitHub.

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📄 License

This project was developed for educational and learning purposes.