Weather_Report

package Learn_and_Build;

import java.net.URL;
import java.net.HttpURLConnection;
import java.util.Scanner;
import org.json.simple.*;
import org.json.simple.parser.JSONParser;

public class W_R {
    public static void main(String[] args) {
        try {
            URL url = new URL("http://api.openweathermap.org/geo/1.0/direct?q=PATNA,BR,IN&limit=5&appid=15f63bb69dc36a090d4ece421e15a0ce");
            /** Here we establish an url connection
              // Create a HttpURLConnection object to send the GET request **/
            HttpURLConnection con = (HttpURLConnection) url.openConnection();
            con.setRequestMethod("GET");
            con.connect(); /** **/

           int rc = con.getResponseCode(); // Check if the response code is 200, which means the request was successful
            System.out.println("The connection's ResponseCode is: " + rc);
            if (rc != 200) {
                System.out.println("Error 404 " + " Try After sometimes");
            } else {
                String data = "";
                // Check if the response code is 200, which means the request was successful
                Scanner sc = new Scanner(url.openStream());

                // Read the response body line by line and append it to a string
                while (sc.hasNext()) {
                    data += sc.nextLine();
                }
                sc.close();


                // Parse the response body as a JSONArray
                JSONParser par = new JSONParser(); // creating a class of par method
                JSONArray arr = (JSONArray) par.parse(data);
                System.out.println(arr);

                JSONObject obj = null; // To store the array of all the element of arr( i,e line no.37)

                // Loop through the JSONArray and extract the latitude and longitude of each city
                for (int i = 0; i < arr.size(); i++) {
                    obj = (JSONObject) arr.get(i);

                    /** TypeCasting **/
                   double lon = (double) obj.get("lon"); // implicit conversion --- means forcefully (lower datatype to higher datatype)
                    double lat = (double) obj.get("lat");

                    // Print the name, latitude and longitude of the city
                    System.out.println("Name of Country:" +obj.get("country"));
                    System.out.println("Name of State:" +obj.get("state"));
                    System.out.println("Name of city:" +obj.get("name"));
                    System.out.println("Latitude : " +lat);
                    System.out.println("Longitude :"+lon);
  
                        /** Pseudo Code
                           1. Geocoding URL - connection
                           2. data fetch - lat , lon
                           3. pass this lat & lon to WeatherAPI
                           4. data fetch - temp , pressure
                        **/
            
                }

            }
        }
       catch(Exception e){}
    }
}
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