Wie kann ich JSON-Daten einfach von einer URL in Java analysieren?

import org.json.JSONException;
import org.json.JSONObject;

public class JsonReader {

  public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
    try (InputStream is = new URL(url).openStream();
         BufferedReader rd = new BufferedReader(new InputStreamReader(is, "UTF-8"))) {
      String jsonText = readAll(rd);
      return new JSONObject(jsonText);
    }
  }

  private static String readAll(Reader rd) throws IOException {
    StringBuilder sb = new StringBuilder();
    int cp;
    while ((cp = rd.read()) != -1) {
      sb.append((char) cp);
    }
    return sb.toString();
  }

  public static void main(String[] args) throws IOException, JSONException {
    // Example URL
    String url = "https://graph.facebook.com/19292868552";
    JSONObject json = readJsonFromUrl(url);
    System.out.println(json.toString());
    System.out.println(json.get("id"));
  }
}