Java Program for Course Enrollment Management

Posted on Jan 28, 2025 in State Administration

Fifth Assignment: Collections

Question: Design a Java program to manage course enrollment details using an ArrayList. Implement the following functionalities using built-in methods (such as add(), set(), size(), remove(), clear(), contains(), isEmpty()) and user input:

a. Include course_id, course name, students enrolled, student_name, and student_id.

Use built-in methods to add this entry to the ArrayList. Display a success message after adding the entry.

CODE:

import java.util.ArrayList;
import java.util.Scanner;

class Course {
    private String courseId;
    private String courseName;
    private ArrayList<String> enrolledStudents;

    public Course(String courseId, String courseName) {
        this.courseId = courseId;
        this.courseName = courseName;
        this.enrolledStudents = new ArrayList<>();
    }

    public String getCourseId() {
        return courseId;
    }

    public String getCourseName() {
        return courseName;
    }

    public ArrayList<String> getEnrolledStudents() {
        return enrolledStudents;
    }

    public void enrollStudent(String studentName, String studentId) {
        enrolledStudents.add(studentName + " (" + studentId + ")");
    }

    public boolean isEnrolled(String studentName, String studentId) {
        String student = studentName + " (" + studentId + ")";
        return enrolledStudents.contains(student);
    }

    public boolean isEmpty() {
        return enrolledStudents.isEmpty();
    }

    public void clearEnrollments() {
        enrolledStudents.clear();
    }
}

public class courseEnroll {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Create ArrayList to store courses
        ArrayList<Course> courses = new ArrayList<>();

        // Main menu
        while (true) {
            System.out.println("\nMenu:");
            System.out.println("1. Add Course");
            System.out.println("2. Enroll Student");
            System.out.println("3. Display Courses and Enrollments");
            System.out.println("4. Exit");
            System.out.print("Enter your choice: ");
            int choice = scanner.nextInt();
            scanner.nextLine(); // Consume newline

            switch (choice) {
                case 1:
                    addCourse(scanner, courses);
                    break;
                case 2:
                    enrollStudent(scanner, courses);
                    break;
                case 3:
                    displayCoursesAndEnrollments(courses);
                    break;
                case 4:
                    System.out.println("Exiting program.");
                    System.exit(0);
                default:
                    System.out.println("Invalid choice. Please try again.");
            }
        }
    }

    private static void addCourse(Scanner scanner, ArrayList<Course> courses) {
        System.out.print("Enter Course ID: ");
        String courseId = scanner.nextLine();
        System.out.print("Enter Course Name: ");
        String courseName = scanner.nextLine();

        Course course = new Course(courseId, courseName);
        courses.add(course);
        System.out.println("Course added successfully.");
    }

    private static void enrollStudent(Scanner scanner, ArrayList<Course> courses) {
        System.out.print("Enter Course ID: ");
        String courseId = scanner.nextLine();
        Course course = findCourse(courseId, courses);
        if (course != null) {
            System.out.print("Enter Student Name: ");
            String studentName = scanner.nextLine();
            System.out.print("Enter Student ID: ");
            String studentId = scanner.nextLine();

            course.enrollStudent(studentName, studentId);
            System.out.println("Student enrolled successfully.");
        } else {
            System.out.println("Course not found.");
        }
    }

    private static void displayCoursesAndEnrollments(ArrayList<Course> courses) {
        if (courses.isEmpty()) {
            System.out.println("No courses available.");
            return;
        }

        for (Course course : courses) {
            System.out.println("Course ID: " + course.getCourseId());
            System.out.println("Course Name: " + course.getCourseName());
            ArrayList<String> enrolledStudents = course.getEnrolledStudents();
            if (!enrolledStudents.isEmpty()) {
                System.out.println("Enrolled Students:");
                for (String student : enrolledStudents) {
                    System.out.println("- " + student);
                }
            } else {
                System.out.println("No students enrolled yet.");
            }
        }
    }

    private static Course findCourse(String courseId, ArrayList<Course> courses) {
        for (Course course : courses) {
            if (course.getCourseId().equals(courseId)) {
                return course;
            }
        }
        return null;
    }
}