Json Parsing in Java using marven library

JsonParsing.java

package vajja;
import vajja.User;
// the old namespace mentioned in the original tutorial is outdated
//import org.codehaus.jackson.map.ObjectMapper;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.DeserializationFeature;

import java.io.File;
import java.net.URL;
import java.io.IOException;

public class UserTest {
  public static void main(String[] args) throws JsonParseException, JsonMappingException, IOException {
    //Here we are taking the input from the json file and extracting the data
	  File jsonFile = new File("user.json");
    
    //This is the command to get data from the url
    URL jsonUrl = new URL("https://gist.githubusercontent.com/vajja/bf13481f31209d0b9f9c/raw/aba5d0ec9345b886426ab767376b7c9cb60c251f/user.json");
    
    //Here we are declaring complete data as string and then extracting into normal daat
    String jsonStr = 
      "{\"name\":{\"first\":\"Joe\",\"last\":\"Sixpack\"},\"gender\":\"MALE\",\"verified\":false,\"userImage\":\"Rm9vYmFyIQ==\"}";
    
    User user = null;

    //convert java to json and viseversa
    ObjectMapper mapper = new ObjectMapper(); 
    mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

    //Here we are reading the json file to user
    user = mapper.readValue(jsonFile, User.class);
    //user.getName().getFirst() first it reads name and then goes to firstname and gives Joe
    System.out.println(user.getName().getFirst());
    
    //this command retrieves the gender from the prints in the output 
    System.out.println(user.getGender());

    //Here the data is taken from the Url data
    user = mapper.readValue(jsonUrl, User.class);
    
    //We are retrieving the data similar to the json file 
    System.out.println(user.getName().getLast());

    //Here we are getting the data from the String jsonString declared above and printing the output
    user = mapper.readValue(jsonStr, User.class);
    System.out.println(user.getGender());
  }
}