private void mainMenuBorrower() throws Exception {
        int input;
        Boolean valid = false;

        while (!valid) {
            System.out.println("");
            System.out.println("===========================");
            System.out.println("What do you want to do ?");
            System.out.println("   1. Display my bookings");
            System.out.println("   2. Display the stock");
            System.out.println("   3. Borrow something");
            System.out.println("   4. Give back something");
            System.out.println("   5. Save to file");
            System.out.println("   6. Log out");
            System.out.println("Type 1, 2, 3, 4, 5 or 6 :");

            input = read.nextInt();
            read.nextLine();

            valid = true;

            switch (input) {
            case 1:
                displayBookings();
                mainMenu();
                break;

            case 2:
                displayStock();
                mainMenu();
                break;

            case 3:
                borrowMenu();
                mainMenu();
                break;

            case 4:
                giveBackMenu();
                mainMenu();
                break;

            case 5:
                save();
                break;

            case 6:
                signOff();
                break;

            default:
                displayBookings();
                mainMenu();
                break;
            }
        }
    }