code: public static void runExample(
        AdWordsServicesInterface adWordsServices, AdWordsSession session, Long adId)
        throws RemoteException {
      // Get the AdService.
      AdServiceInterface adService = adWordsServices.get(session, AdServiceInterface.class);
  
      // Creates an expanded text ad using the provided ad ID.
      ExpandedTextAd expandedTextAd = new ExpandedTextAd();
      expandedTextAd.setId(adId);
      // Updates some properties of the expanded text ad.
      expandedTextAd.setHeadlinePart1("Cruise to Pluto #" + System.currentTimeMillis());
      expandedTextAd.setHeadlinePart2("Tickets on sale now");
      expandedTextAd.setDescription("Best space cruise ever.");
      expandedTextAd.setFinalUrls(new String[] {"http://www.example.com/"});
      expandedTextAd.setFinalMobileUrls(new String[] {"http://www.example.com/mobile"});
  
      // Creates ad group ad operation and adds it to the list.
      AdOperation operation = new AdOperation();
      operation.setOperator(Operator.SET);
      operation.setOperand(expandedTextAd);
  
      // Updates the ad on the server.
      ExpandedTextAd updatedAd =
          (ExpandedTextAd) adService.mutate(new AdOperation[] {operation}).getValue(0);
  
      // Prints out some information.
      System.out.printf("Expanded text ad with ID %d was updated.%n", updatedAd.getId());
      System.out.printf(
          "Headline part 1 is '%s'.%nHeadline part 2 is '%s'.%nDescription is '%s'.%n",
          updatedAd.getHeadlinePart1(), updatedAd.getHeadlinePart2(), updatedAd.getDescription());
      System.out.printf(
          "Final URL is '%s'.%nFinal mobile URL is '%s'.%n",
          updatedAd.getFinalUrls()[0], updatedAd.getFinalMobileUrls()[0]);
    }
docs: Runs the example.
  
  @param adWordsServices the services factory.
  @param session the session.
  @param adId the ID of the ad to update.
  @throws ApiException if the API request failed with one or more service errors.
  @throws RemoteException if the API request failed due to other errors.