LearnTrack - Student & Course Management System

LearnTrack is a console-based Student & Course Management System developed using Core Java. It allows administrators to manage students, courses, and enrollments through a menu-driven console interface.

The primary objective of this project is to practice Java fundamentals including Object-Oriented Programming, Collections, Exception Handling, and clean code organization.

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Features

Student Management

• Add a new student
• View all students
• Search student by ID
• Deactivate a student

Course Management

• Add a new course
• View all courses
• Search course by ID
• Deactivate a course

Enrollment Management

• Enroll a student into a course
• View all enrollments
• Cancel an enrollment

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Project Structure

src/
└── com/
    └── airtribe/
        └── learntrack/
            ├── entity/
            ├── repository/
            ├── service/
            ├── util/
            ├── enums/
            ├── exception/
            └── Main.java

docs/
    Setup_Instructions.md
    JVM_Basics.md
    Design_Notes.md

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Class Diagram

                    Person
                       ▲
                       │
                   Student

StudentService ---------> StudentRepository ---------> ArrayList<Student>

CourseService ----------> CourseRepository ----------> ArrayList<Course>

EnrollmentService -----> EnrollmentRepository -------> ArrayList<Enrollment>

EnrollmentService
       │
       ├────────► StudentService
       │
       └────────► CourseService

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Technologies Used

• Java
• IntelliJ IDEA
• Core Java Collections (ArrayList)
• Object-Oriented Programming

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OOP Concepts Demonstrated

Encapsulation

• Private fields with public getters and setters.

Inheritance

• Student extends Person.

Constructor Overloading

• Multiple constructors in entity classes.

Polymorphism

• Method overriding (toString()).

Static Members

• IdGenerator uses static counters to generate unique IDs.

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Project Architecture

The application follows a layered architecture.

Console UI (Main)
        │
        ▼
Service Layer
        │
        ▼
Repository Layer
        │
        ▼
In-Memory Storage (ArrayList)

Entity Layer

Represents the business objects.

• Student
• Course
• Enrollment
• Person

Repository Layer

Responsible for storing and retrieving data from memory.

Service Layer

Contains business logic and validation.

Main

Handles user interaction and menu navigation.

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Exception Handling

The application uses a custom exception:

• EntityNotFoundException

It is used whenever an invalid Student, Course, or Enrollment ID is requested.

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How to Run

1. Clone the repository.

git clone <your-github-repository-url>

2. Open the project in IntelliJ IDEA.

3. Configure the JDK (Java 17 or later).

4. Run Main.java.

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Future Improvements

• Persistent database support (MySQL/PostgreSQL)
• Spring Boot REST APIs
• Authentication & Authorization
• Duplicate enrollment validation
• Unit Testing (JUnit)
• Logging
• Input validation

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Learning Outcomes

This project helped in understanding:

• Java classes and objects
• Packages
• Encapsulation
• Inheritance
• Constructor overloading
• Collections using ArrayList
• Exception Handling
• Layered Architecture
• Separation of Concerns
• Static members and utility classes

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