Getting data from Rest API Server with concurrency

GetAPI.java

import java.lang.Runnable;

import java.net.URL;
import java.net.HttpURLConnection;
import java.io.BufferedReader;
import java.io.InputStreamReader;

class DataCollector implements Runnable {

  StringBuffer result;

  public void run() {
    try {
      URL url = new URL("https://jsonplaceholder.typicode.com/users/1");
      HttpURLConnection con = (HttpURLConnection) url.openConnection();
      con.setRequestMethod("GET");

      BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
      String inputLine;
      StringBuffer content = new StringBuffer();
      while ((inputLine = in.readLine()) != null) {
        content.append(inputLine);
      }


      this.result = content;

      in.close();

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

  StringBuffer showResult() {
    return result;
  }

}

class LoadingScreen implements Runnable {
  public void run() {
    System.out.println("Loading...");
  }
}

public class GetAPI {
  public static void main(String[] args) throws Exception {
    DataCollector dataCollector = new DataCollector();
    Thread dataCollectorThread = new Thread(dataCollector);
    dataCollectorThread.start();

    (new Thread(new LoadingScreen())).start();
    
    dataCollectorThread.join();
    System.out.println(dataCollector.showResult());
  }
}