public void update(Observable observable, Object arg)
		{
			// safety check, then PULL
			if (observable instanceof WeatherData_SolutionJava)
			{
				WeatherData_SolutionJava weatherData = (WeatherData_SolutionJava) observable;
				this.temperature = weatherData.getTemperature();
				this.humidity = weatherData.getHumidity();
				
				display();
			}
		}