GetFile.java

        List<File> result = new ArrayList<>();
        Files.List request = service.files().list();

        do {
            try {
                FileList files = request.execute();
                result.addAll(files.getItems());
                request.setPageToken(files.getNextPageToken());
            } catch (IOException e) {
                System.out.println("An error occurred: " + e);
                request.setPageToken(null);
            }
        } while (request.getPageToken() != null &&
                request.getPageToken().length() > 0);