public static void manageStudents() {
		System.out.print("Do you want to add (0) or delete (1) a student ? ");

		int res = -1;

		while (res < 0 || res > 1) {
			Scanner sc = new Scanner(System.in);
			res = sc.nextInt();
		}

		switch (res) {
		case 0:
			createStudent();
			break;
		case 1:
			if (FileReadService.sList.isEmpty()) {
				System.out.println("There is no Student !");
			} else {
				System.out.println("Which student do you want delete ?");
				displayStudentList();
				Scanner scIndexS = new Scanner(System.in);

				Student s = null;
				while (s == null) {
					int iS = scIndexS.nextInt();
					s = chooseStudentList(iS);
					FileReadService.pList.get(iS).remove(s);
				}
				FileReadService.sList.remove(s);
				System.out.println("The student " + s.displayNames()
						+ " has been deleted.");
			}
			break;
		default:
			createStudent();
			break;
		}
	}