👨‍💻 Atharva Nhavkar | Internship Portfolio

Java Programming Intern @ CodeAlpha
Focus: Backend Development, Database Management, and System Logic
Duration: January 2026

---

📖 About This Repository

Welcome! This repository contains the source code for the projects I delivered during my virtual internship at CodeAlpha. These tasks were instrumental in refining my skills in Core Java, JDBC Architecture, and Oracle Database integration.

---

🔨 Project Showcase

📊 Task 1: Student Grade Tracker

A logic-based utility for academic performance analysis.

A Java application designed to calculate, track, and analyze student grades for educational institutions.

• ✨ Key Features:

  • Dynamic array handling for flexible student counts.
  • Computation engine: Calculates Average, Highest, and Lowest scores instantly.
  • Robust input validation for error-free execution.

• 🛠️ Tech Stack: Core Java Arrays Scanner Class

• 📂 View Source Code

🏨 Task 4: Hotel Reservation System (Major Project)

A comprehensive backend system handling reservations, cancellations, and persistent data storage.

This is a console-based enterprise application that bridges Java logic with a live database.

• ✨ Key Features:

  • Oracle DB Integration: Stores room and booking data permanently using JDBC (no data loss on exit).
  • Smart Logic: Validates room availability and prevents overlapping bookings.
  • Automated Receipt Generation: Uses File Handling (I/O) to print a text-file receipt for every successful transaction.
  • Room Categories: Filter functionality for Single, Double, and Suite rooms.

• 🛠️ Tech Stack: Java (JDK 17) JDBC Oracle 11g/18c SQL

• 📂 View Source Code

---

💻 Technical Stack

Category	Technologies
Primary Language	Java (Core & Advanced)
Database	Oracle Database 11g/18c XE
Connectivity	JDBC (Java Database Connectivity)
Tools	Eclipse IDE, Git Version Control

---

⚙️ Setup & Run Instructions

1. Clone the Repository:

   git clone [https://github.com/atharvanhavkar1416/CodeAlpha_Tasks.git](https://github.com/atharvanhavkar1416/CodeAlpha_Tasks.git)

2. Database Configuration (For Task 4):

   • Open the database.sql file located in the Hotel System folder.
   • Execute the script in your Oracle SQL command line.
   • Update DBConnection.java with your own Oracle username and password.

3. Execution:

   • Import the folder into Eclipse IDE.
   • Run Main.java as a Java Application.

---

🌐 Connect with Me

• LinkedIn: [https://www.linkedin.com/in/atharva-nhavkar-388162315/]
• GitHub: atharvanhavkar1416

---

🚀 Developed by Atharva Nhavkar