Building an Student Enrollment Application in Java

In the world of education, managing student enrollment efficiently is a critical task for educational institutions. To streamline this process, a Student Enrollment System is often employed. In this article, we will explore the design of a simple Student Enrollment System using class diagrams and provide corresponding Java class examples.

Understanding the Student Enrollment System

Before we delve into the class diagram and Java examples, let's break down the key components of the Student Enrollment System:

Students: These are individuals who want to enroll in courses. They have attributes such as student ID, name, and contact information.

Courses: Courses represent the educational offerings available. Each course has attributes like course code, title, and a maximum number of students it can accommodate.

Enrollments: Enrollments establish the relationship between students and courses. An enrollment contains information about the student, the course they are enrolled in, and possibly the enrollment date.

Designing the Class Diagram

To create a class diagram, we need to identify the classes, their attributes, and the associations between them. Here's a simplified class diagram for our Student Enrollment System:

Student Enrollment System Class Diagram

Java Class Examples

Now, let's implement these classes in Java:


public class Student {
    private int studentId;
    private String name;
    private String contactInfo;

    // Constructor
    public Student(int studentId, String name, String contactInfo) {
        this.studentId = studentId;
        this.name = name;
        this.contactInfo = contactInfo;
    }

    // Getters and setters (not shown for brevity)

    // Method to enroll in a course
    public void enrollInCourse(Course course) {
        // Add logic here to associate this student with the given course
    }

    // Method to drop a course
    public void dropCourse(Course course) {
        // Add logic here to disassociate this student from the given course
    }
}

import java.util.ArrayList;
import java.util.List;

public class Course {
    private String courseCode;
    private String title;
    private int maxStudents;
    private List<Student> enrolledStudents;

    // Constructor
    public Course(String courseCode, String title, int maxStudents) {
        this.courseCode = courseCode;
        this.title = title;
        this.maxStudents = maxStudents;
        this.enrolledStudents = new ArrayList<>();
    }

    // Getters and setters (not shown for brevity)

    // Method to add a student to the enrolled students list
    public boolean addStudent(Student student) {
        if (enrolledStudents.size() < maxStudents) {
            enrolledStudents.add(student);
            return true; // Enrollment successful
        }
        return false; // Enrollment failed (course is full)
    }

    // Method to remove a student from the enrolled students list
    public boolean removeStudent(Student student) {
        return enrolledStudents.remove(student);
    }
}

Enrollment.java

import java.util.Date;

public class Enrollment {
    private int enrollmentId;
    private Student student;
    private Course course;
    private Date enrollmentDate;

    // Constructor
    public Enrollment(int enrollmentId, Student student, Course course, Date enrollmentDate) {
        this.enrollmentId = enrollmentId;
        this.student = student;
        this.course = course;
        this.enrollmentDate = enrollmentDate;
    }

    // Getters and setters (not shown for brevity)

    // Additional methods

    // Method to check if an enrollment is active (not dropped)
    public boolean isActive() {
        // You can implement logic here to check if the enrollment is still active based on your requirements.
        // For example, check if the student hasn't dropped the course.
        // Return true if active, false otherwise.
        // You can also consider enrollment dates and other factors.
        return true;
    }

    // Method to get the course title associated with this enrollment
    public String getCourseTitle() {
        return course.getTitle();
    }

    // Method to get the student's name associated with this enrollment
    public String getStudentName() {
        return student.getName();
    }

    // Method to get the enrollment date
    public Date getEnrollmentDate() {
        return enrollmentDate;
    }
}

These Java classes align with the class diagram we designed earlier. You can further expand upon these classes by adding validation and business logic as per your specific requirements.

In conclusion, a well-designed Student Enrollment System helps educational institutions manage student enrollments efficiently. By creating a class diagram and implementing classes in Java, you can lay a strong foundation for such a system and easily adapt it to your institution's needs.

Low Level Design

Understanding the Student Enrollment System

Designing the Class Diagram

Java Class Examples