TusharHacktoberfest1

*******************************************************    School management Project in java   ****************************************************************
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

class Student {
    private String studentId;
    private String name;
    
    public Student(String studentId, String name) {
        this.studentId = studentId;
        this.name = name;
    }
    
    public String getStudentId() {
        return studentId;
    }
    
    public String getName() {
        return name;
    }
    
    @Override
    public String toString() {
        return "Student ID: " + studentId + ", Name: " + name;
    }
}

class Course {
    private String courseId;
    private String courseName;
    
    public Course(String courseId, String courseName) {
        this.courseId = courseId;
        this.courseName = courseName;
    }
    
    public String getCourseId() {
        return courseId;
    }
    
    public String getCourseName() {
        return courseName;
    }
    
    @Override
    public String toString() {
        return "Course ID: " + courseId + ", Name: " + courseName;
    }
}

public class SchoolManagementSystem {
    private static Map<String, Student> students = new HashMap<>();
    private static Map<String, Course> courses = new HashMap<>();
    private static Map<String, List<String>> enrollments = new HashMap<>();
    
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        while (true) {
            System.out.println("School Management System");
            System.out.println("1. Add Student");
            System.out.println("2. Add Course");
            System.out.println("3. Enroll Student in Course");
            System.out.println("4. List Enrolled Students in Course");
            System.out.println("5. Exit");
            System.out.print("Enter your choice: ");
            
            int choice = scanner.nextInt();
            scanner.nextLine(); // Consume the newline
            
            switch (choice) {
                case 1:
                    addStudent(scanner);
                    break;
                case 2:
                    addCourse(scanner);
                    break;
                case 3:
                    enrollStudentInCourse(scanner);
                    break;
                case 4:
                    listEnrolledStudentsInCourse(scanner);
                    break;
                case 5:
                    System.out.println("Exiting the program.");
                    System.exit(0);
                default:
                    System.out.println("Invalid choice. Please try again.");
                    break;
            }
        }
    }
    
    private static void addStudent(Scanner scanner) {
        System.out.print("Enter student ID: ");
        String studentId = scanner.nextLine();
        System.out.print("Enter student name: ");
        String name = scanner.nextLine();
        
        Student student = new Student(studentId, name);
        students.put(studentId, student);
        System.out.println("Student added successfully.");
    }
    
    private static void addCourse(Scanner scanner) {
        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.put(courseId, course);
        System.out.println("Course added successfully.");
    }
    
    private static void enrollStudentInCourse(Scanner scanner) {
        System.out.print("Enter student ID: ");
        String studentId = scanner.nextLine();
        System.out.print("Enter course ID: ");
        String courseId = scanner.nextLine();
        
        if (students.containsKey(studentId) && courses.containsKey(courseId)) {
            enrollments.computeIfAbsent(courseId, k -> new ArrayList<>()).add(studentId);
            System.out.println("Student enrolled in the course.");
        } else {
            System.out.println("Student or course not found. Please check the IDs.");
        }
    }
    
    private static void listEnrolledStudentsInCourse(Scanner scanner) {
        System.out.print("Enter course ID: ");
        String courseId = scanner.nextLine();
        
        if (courses.containsKey(courseId)) {
            List<String> enrolledStudents = enrollments.getOrDefault(courseId, new ArrayList<>());
            System.out.println("Enrolled students in the course:");
            for (String studentId : enrolledStudents) {
                System.out.println(students.get(studentId));
            }
        } else {
            System.out.println("Course not found. Please check the course ID.");
        }
    }
}