code: private void initializeLocalhostNI() {
      InetAddress localhost;
      try {
        localhost = InetAddress.getLocalHost();
        NetworkInterface ni = NetworkInterface.getByInetAddress(localhost);
  
        if (ni != null)
          getNIList().add(ni.getName());
  
      } catch (UnknownHostException | SocketException e) {
        Console.severe("Cannot get the Network Interface for localhost");
        Console.severe(e.getMessage());
      }
  
    }
docs: Sets up the network interface list with at least the localhost NI.