How to get distance from google distance matrix Api in Java

I am trying to find the distance and time between two places using google distance matrix api Everything was fine until I got this Data

{
   "destination_addresses" : [
      "Some Address"
   ],
   "origin_addresses" : [ "Some other address" ],
   "rows" : [
      {
         "elements" : [
            {
               "distance" : {
                  "text" : "13.1 km",
                  "value" : 13133
               },
               "duration" : {
                  "text" : "33 mins",
                  "value" : 1961
               },
               "status" : "OK"
            }
         ]
      }
   ],
   "status" : "OK"
}

I tried to extract distance using Json libraries and tried many answers too,but dint get the expected result ,Any help??

Well this is a complete answer of how to calculate distance and time with google distance matrix api between two places. If you are not using maven then you have to set these jars in your classpath

pom.xml

<!-- https://mvnrepository.com/artifact/com.squareup.okhttp3/okhttp -->
<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>3.9.0</version>
</dependency>
  <!-- https://mvnrepository.com/artifact/com.squareup.okio/okio -->
<dependency>
    <groupId>com.squareup.okio</groupId>
    <artifactId>okio</artifactId>
    <version>1.12.0</version>
</dependency>
  <!-- https://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple -->
<dependency>
    <groupId>com.googlecode.json-simple</groupId>
    <artifactId>json-simple</artifactId>
    <version>1.1.1</version>
</dependency>

  <!-- https://mvnrepository.com/artifact/com.google.api-client/google-api-client -->
<dependency>
    <groupId>com.google.api-client</groupId>
    <artifactId>google-api-client</artifactId>
    <version>1.23.0</version>
</dependency>

This is a class to send http request and get the data in json format

 package google.distance.api;

import java.io.IOException;

import org.springframework.stereotype.Component;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

@Component
public class DistanceTime {



    private static final String API_KEY="YOUR KEY";
    OkHttpClient client = new OkHttpClient();


public String calculate(String source ,String destination) throws IOException {
String url="https://maps.googleapis.com/maps/api/distancematrix/json?origins="+source+"&destinations="+destination+"&key="+ API_KEY;
            Request request = new Request.Builder()
                .url(url)
                .build();

            Response response = client.newCall(request).execute();
            return response.body().string();
          }


}

As I am using Spring ,so here is my Controller method to get the data

private DistanceTime distance;

     @Autowired
    public void setDistance(DistanceTime distance) {
    this.distance = distance;
}


    public ModelAndView Api(@RequestParam("picking_up") String source,@RequestParam("dropping_off") String destination,@RequestParam("pick_up_date") String time) {
            try {
                  //method of DistanceTime Class
                String response=distance.calculate(source,destination);

            System.out.println(response);
            }

            catch(Exception e) {
                System.out.println("Exception Occurred");
            }

            return new ModelAndView("home");

        }  

Now the Tough Part was iterating over JSON data to get the distance and time In the above method I was getting json data in variable response ,so here is the code to extract distance and time from it The response was something Like

{
   "destination_addresses" : [
      "Private"
   ],
   "origin_addresses" : [ "Private" ],
   "rows" : [
      {
         "elements" : [
            {
               "distance" : {
                  "text" : "1,052 km",
                  "value" : 1051911
               },
               "duration" : {
                  "text" : "17 hours 10 mins",
                  "value" : 61785
               },
               "status" : "OK"
            }
         ]
      }
   ],
   "status" : "OK"
}



 JSONParser parser = new JSONParser();
        try {

         Object obj = parser.parse(response);
         JSONObject jsonobj=(JSONObject)obj;

         JSONArray dist=(JSONArray)jsonobj.get("rows");
         JSONObject obj2 = (JSONObject)dist.get(0);
         JSONArray disting=(JSONArray)obj2.get("elements");
         JSONObject obj3 = (JSONObject)disting.get(0);
         JSONObject obj4=(JSONObject)obj3.get("distance");
         JSONObject obj5=(JSONObject)obj3.get("duration");
         System.out.println(obj4.get("text"));
         System.out.println(obj5.get("text"));

    }
catch(Exception e) {
    e.printStackTrace();
}