public class app
    {
    private static String urlString;
    private static URL url = null;
    public static void main(String[] args) throws IOException
        {
                String urlStr= "http://api.worldweatheronline.com/premium/v1/weather.ashx?key=c6af9bbd12814081994190330191301&q=";
                String city =  args[0];
                String days = args[1];
                urlString = urlStr + URLEncoder.encode(city, "UTF8")+"&format=json&num_of_days=" + URLEncoder.encode(days, "UTF8");
                BufferedReader reader= null;
                HttpURLConnection connection = null;
                StringBuilder stringBuilder = new StringBuilder();
                String line =null;
                try
                {
                    url = new URL(urlString);
                }
                catch(MalformedURLException e)
                {
                    System.out.println("URL Error");
                }
                try
                {
                    connection = (HttpURLConnection)url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setReadTimeout(15*100000);
                    connection.connect();
                }
                catch(NullPointerException e)
                {
                    System.out.println("Connection error");
                }
                try
                {
                    reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                    while((line = reader.readLine()) != null)
                    {
                        stringBuilder.append(line);
                    }
                }
                catch(NullPointerException e)
                {
                    System.out.println("Reader error");
                }
                String jsonString = stringBuilder.toString();
                if(reader!=null)
                reader.close();
                try
                {
                    JsonObject jsonObj = new JsonParser().parse(jsonString).getAsJsonObject();
                    JsonObject jsonData = jsonObj.getAsJsonObject("data");
                    JsonArray jsonArray = jsonData.getAsJsonArray("request");
                    for(int i = 0;i<jsonArray.size();i++)
                    {
                        String postId = jsonArray.get(i).getAsJsonObject().get("query").getAsString();
                        System.out.println(postId);
                    }
                    jsonArray = jsonData.getAsJsonArray("weather");
                    for(int i = 0;i<jsonArray.size();i++)
                    {
                        String postId = jsonArray.get(i).getAsJsonObject().get("date").getAsString();
                        String postId2 = jsonArray.get(i).getAsJsonObject().get("mintempC").getAsString();
                        String postId3 = jsonArray.get(i).getAsJsonObject().get("maxtempC").getAsString();
                        System.out.println(postId + " temperatura min = " + postId2 + ", temperatura max = " + postId3);
                    }
                }
                catch(IllegalStateException e)
                {
                    System.out.println("Json object error");
                }
        }
    }