private static String toSerializedString(ArrayList<Station> stations) { String serialized = ""; for (Station s : stations) { String[] parameters = new String[4]; parameters[PARAMETER_STATION_NUMBER] = s.getNumber() + ""; parameters[PARAMETER_STATION_NAME] = s.getName(); parameters[PARAMETER_STATION_URL] = s.getUrl(); parameters[PARAMETER_STATION_TEMPERATURE] = s.getTemperature() + ""; for (String parameter : parameters) serialized += parameter + SEPARATE_PARAMETERS_TAG; serialized += SEPARATE_STATIONS_TAG; } return serialized; }