weatherdataparser.java

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class WeatherDataParser {

	/**
	 * Given a string of the form returned by the api call:
	 * http://api.openweathermap.org/data/2.5/forecast/daily?q=94043&mode=json&units=metric&cnt=7 
	 * retrieve the maximum temperature for the day indicated by dayIndex
	 * (Note: 0-indexed, so 0 would refer to the first day).
	 */
	public static double getMaxTemperatureForDay(String weatherJsonStr, int dayIndex)
		throws JSONException {
		// TODO: add parsing code here
        final String OWM_LIST = "list";
        final String OWM_TEMPERATURE = "temp";
        final String OWM_MAX = "max";

        JSONObject forecastJson = new JSONObject(weatherJsonStr);
        JSONArray weatherArray = forecastJson.getJSONArray(OWM_LIST);
               
        // Get the JSON object representing the day
        JSONObject dayForecast = weatherArray.getJSONObject(dayIndex);
            
        // Temperatures are in a child object called "temp". Try not to name variables    
        // "temp" when working with temperature. It confuses everybody.

        JSONObject temperatureObject = dayForecast.getJSONObject(OWM_TEMPERATURE);
                    
        double high = temperatureObject.getDouble(OWM_MAX);
             
        return high;

	}

}