Sample 5

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;

import com.howtodoinjava.model.User;

public class PureJavaClient
{
    public static void main(String[] args)
    {
        try
        {
            URL url = new URL("http://localhost:8080/RESTfulDemoApplication/user-management/users/10");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setRequestProperty("Accept", "application/xml");

            if (conn.getResponseCode() != 200)
            {
                throw new RuntimeException("Failed : HTTP error code : " + conn.getResponseCode());
            }

            BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));
            String apiOutput = br.readLine();
            System.out.println(apiOutput);
            conn.disconnect();
 // this part need to be repalce with json parser
            JAXBContext jaxbContext = JAXBContext.newInstance(User.class);
            Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
            User user = (User) jaxbUnmarshaller.unmarshal(new StringReader(apiOutput));

            System.out.println(user.getId());
            System.out.println(user.getFirstName());
            System.out.println(user.getLastName());
           
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JAXBException e) {
            e.printStackTrace();
        }
    }
}