Main.java

import java.util.Scanner;

public class Main {
    public static void main(String[] args){

        Scanner scanner = new Scanner(System.in);

        StudentManager manager = new StudentManager();

        while(true){
            System.out.println("\n===== Student Management System =====");
            System.out.println("1. Add Student");
            System.out.println("2. View Students");
            System.out.println("3. Search Student");
            System.out.println("4. Update Student");
            System.out.println("5. Delete Student");
            System.out.println("6. Exit");

            System.out.println("Enter your choice");

            int choice = scanner.nextInt();

            switch (choice){
                case 1:
                    scanner.nextLine();

                    System.out.println("Enter ID");
                    int id = scanner.nextInt();

                    scanner.nextLine();

                    System.out.println("Enter Name: ");
                    String name = scanner.nextLine();

                    System.out.println("Enter Age: ");
                    int age = scanner.nextInt();

                    scanner.nextLine();

                    System.out.println("Enter Course");
                    String course = scanner.nextLine();

                    Student student = new Student(id,name,age, course);
                    manager.addStudent(student);

                    break;

                case 2:
                    manager.viewStudents();
                    break;

                case 3:
                    System.out.println("Enter student ID to search: ");
                    int searchId = scanner.nextInt();

                    Student foundStudent = manager.searchStudentById(searchId);

                    if(foundStudent == null){
                        System.out.println("Student Not Found");
                    }else {
                        System.out.println(foundStudent);
                    }
                    break;

                case 4:
                    System.out.println("Enter student ID:");
                    int updateId = scanner.nextInt();

                    System.out.println("Enter New Name");
                    String newName = scanner.nextLine();

                    System.out.println("Enter New Age");
                    int newAge = scanner.nextInt();

                    System.out.println("Enter New Course");
                    String newCourse = scanner.nextLine();

                    manager.updateStudent(updateId, newName, newAge, newCourse);

                    break;

                case 5:
                    System.out.println("Enter Student ID to delete");
                    int deleteID = scanner.nextInt();

                    manager.deleteStudent(deleteID);

                    break;


                case 6:

                    System.out.println("Exiting the program....");
                    scanner.close();
                    System.exit(0); // Terminates JVM
                    break;

                default:
                    System.out.println("Invalid Choice");
                    break;
            }
        }
    }
}