🧑‍🎓 Student Management System

A simple console-based Java application that demonstrates Object-Oriented Programming (OOP) concepts like Classes, Objects, Inheritance, Polymorphism, Encapsulation, and Abstraction.
It allows users to add, view, and delete student records.

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🧩 Features

• ➕ Add new students (Undergraduate or Graduate)
• 📜 View all student details
• ❌ Delete student by Roll Number
• 🧠 Uses OOP concepts (Class, Object, Inheritance, Polymorphism, etc.)
• 📦 Console-based and beginner-friendly project

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🧠 Concepts Used

Concept	Description
Class & Object	Student, UndergraduateStudent, GraduateStudent
Constructor & this keyword	Initializes student data
Encapsulation	Private fields with Getters/Setters
Inheritance	UG & PG classes extend Student
Polymorphism	Overridden displayInfo() method
Abstraction	Abstract Student class
Access Modifiers	Public & Private fields/methods
Static	(Can be used to count total students)

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▶️ How to Run

1️⃣ Clone this repository:

git clone https://github.com/Shilpask123/Student-Management-System.git

2️⃣ Open in your IDE:

Open the folder in IntelliJ IDEA or Eclipse.

3️⃣ Run the program:

Run the Main.java file. Follow the console instructions.

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🧾 Sample Output

===== Student Management System =====

1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 1
Enter Student Type (UG/PG): UG
Enter Name: Shilpa KAmable
Enter Roll No: 41
Enter Marks: 89
Student added successfully!


1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 1
Enter Student Type (UG/PG): PG
Enter Name: Ajay S K
Enter Roll No: 56
Enter Marks: 98
Student added successfully!


1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 2
===== Student List =====
Name: Shilpa KAmable
Roll No: 41
Marks: 89
Grade: A
Type: Undergraduate
------------------------------------
Name: Ajay S K
Roll No: 56
Marks: 98
Grade: A+
Type: Graduate
------------------------------------
Total Students: 2

1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 3
Enter Roll No of student to delete: 41
Student removed successfully!


1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 2
===== Student List =====
Name: Ajay S K
Roll No: 56
Marks: 98
Grade: A+
Type: Graduate
------------------------------------
Total Students: 1

1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 1
Enter Student Type (UG/PG): Roopa Kambale
Enter Name: Roopa Kambale
Enter Roll No: 43
Enter Marks: 86
Invalid student type!

1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 2
===== Student List =====
Name: Ajay S K
Roll No: 56
Marks: 98
Grade: A+
Type: Graduate
------------------------------------
Total Students: 1

1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 1
Enter Student Type (UG/PG): PG
Enter Name: Roopa Kambale
Enter Roll No: 43
Enter Marks: 87
Student added successfully!


1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 2
===== Student List =====
Name: Ajay S K
Roll No: 56
Marks: 98
Grade: A+
Type: Graduate
------------------------------------
Name: Roopa Kambale
Roll No: 43
Marks: 87
Grade: A
Type: Graduate
------------------------------------
Total Students: 2

1. Add Student
2. View All Students
3. Delete Student
4. Exit
Enter your choice: 4
Exiting... Thank you!

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💻 Project Structure

StudentManagementSystem/
├── Main.java
├── Student.java
├── UndergraduateStudent.java
├── GraduateStudent.java
└── StudentManagement.java

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📚 Learnings

• Through this project, I learned:

• How to design and structure a Java application using OOP principles

• How inheritance and polymorphism make code reusable and flexible

• How abstraction helps hide details and show only essential information