Подскажите, пожалуйста, почему отличается вывод при использовании try-with-resources ?

Apartment apartment = new Apartment("Mavzoley", 2021);
       String file;

       try (BufferedReader reader = new BufferedReader(new InputStreamReader(System.in))) {
           file = reader.readLine();
       }

       try (ObjectOutputStream outputStream = new ObjectOutputStream(new FileOutputStream(file));
            ObjectInputStream inputStream = new ObjectInputStream(new FileInputStream(file))) {

           apartment.writeExternal(outputStream);

           Apartment loaded = new Apartment();
           loaded.readExternal(inputStream);

           System.out.println(apartment);
           System.out.println(loaded);

           /*результат
           null
           Address: Mavzoley
           Year: 2021
           Address: Mavzoley
           Year: 0
           */

       }

       ObjectOutputStream outputStream = new ObjectOutputStream(new FileOutputStream(file));
       apartment.writeExternal(outputStream);
       outputStream.close();

       Apartment loaded = new Apartment();
       ObjectInputStream inputStream = new ObjectInputStream(new FileInputStream(file));
       loaded.readExternal(inputStream);
       inputStream.close();

       System.out.println(apartment);
       System.out.println(loaded);

           /*результат
           Address: Mavzoley
           Year: 2021
           Address: Mavzoley
           Year: 2021
           */