Java-Development-Intern-Tasks

This repository contains a collection of Java projects I have completed as part of my learning journey.
The projects are organized into different levels based on complexity — starting with beginner-friendly programs and gradually moving toward advanced applications involving OOP, File Handling, JDBC, and Multithreading.

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📂 Project Structure

🟢 Level 1 — Basics

1. Basic Calculator → Perform arithmetic operations (addition, subtraction, multiplication, division).
2. Number Guessing Game → Simple console game where the user guesses a randomly generated number.
3. Factorial Calculation → Program to compute the factorial of a number using loops/recursion.

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🟡 Level 2 — Intermediate

1. File Handling (Read & Write) → Read from and write data to a file using Java I/O streams.
2. Simple Banking Application → Deposit, withdraw, and check balance with a basic banking logic and user interaction.
3. Employee Management System (OOP) → Demonstrates Object-Oriented Programming concepts (Encapsulation, Inheritance, Polymorphism).

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🔴 Level 3 — Advanced

1. Library Management System (JDBC) →

   • CRUD operations for Books and Users
   • Borrow/Return functionality with transaction records
   • Uses MySQL Database + JDBC for connectivity

2. Multithreaded Chat Application →

   • Console-based chat app
   • Uses Java Sockets + Multithreading
   • Multiple clients can connect and chat simultaneously

3. Binary Search Implementation →

   • Implementation of Binary Search Tree (BST)
   • Supports insertion, deletion, search, and traversal (in-order, pre-order, post-order).

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🛠️ Tech Stack

• Language: Java (Core + Advanced)
• Database: MySQL (for JDBC projects)
• Concepts Used:
  • OOP (Encapsulation, Inheritance, Polymorphism)
  • File Handling
  • Exception Handling
  • Multithreading
  • Socket Programming
  • JDBC (Database Connectivity)

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