code: public static void config(String rootPath, boolean useRootRelativePath, String serverURL) throws IOException {
          HttpURLConnection con = null;
          try {
              String urlString = new StringBuilder().append(serverURL).append("/?").append(Constants.ROOT_PATH)
                      .append("=").append(rootPath).append("&").append(Constants.USE_ROOT_RELATIVE_PATH).append("=")
                      .append(String.valueOf(useRootRelativePath)).toString();
              con = (HttpURLConnection) new URL(urlString).openConnection();
              con.setRequestMethod(METHOD);
              con.setReadTimeout(READ_TIMEOUT);
              con.getResponseCode();
          } finally {
              con.disconnect();
          }
      }
docs: Configures the HttpSimulator running on the specified serverURL (e.g. http://localhost:8080) with the specified
  root path and useRootRelativePath.
  
  @param rootPath the rootPath
  @param useRootRelativePath the useRootRelativePath
  @param serverURL the serverURL
  @throws IOException if something goes wrong