public static void main(String[] args) throws IOException {
    Boolean[] array = new Boolean[SIZE];
    Arrays.fill(array, Boolean.FALSE);

    YouTube youtube = getYouTubeService();
        try {
            HashMap<String, String> parameters = new HashMap<>();
            parameters.put("part", "snippet");
            parameters.put("videoId", "xxxxxxxxx");
            parameters.put("fields", "items/snippet/topLevelComment/snippet/textDisplay,nextPageToken");
            parameters.put("searchTerms", "xxxxxx");

            YouTube.CommentThreads.List commentThreadsListByVideoIdRequest = youtube.commentThreads().list(parameters.get("part").toString());
            commentThreadsListByVideoIdRequest.setMaxResults(100L);
            commentThreadsListByVideoIdRequest.setTextFormat("plaintext");
            if (parameters.containsKey("searchTerms") && parameters.get("searchTerms") != "") {
                commentThreadsListByVideoIdRequest.setFields(parameters.get("searchTerms").toString());
            }
            if (parameters.containsKey("fields") && parameters.get("fields") != "") {
                commentThreadsListByVideoIdRequest.setFields(parameters.get("fields").toString());
            }
            if (parameters.containsKey("videoId") && parameters.get("videoId") != "") {
                commentThreadsListByVideoIdRequest.setVideoId(parameters.get("videoId").toString());
            }

            while(true) {
                if (parameters.containsKey("nextPageToken") && parameters.get("nextPageToken") != "") {
                    commentThreadsListByVideoIdRequest.setPageToken(parameters.get("nextPageToken").toString());
                }
                CommentThreadListResponse response = commentThreadsListByVideoIdRequest.execute();
                List<CommentThread> videoComments = response.getItems();
                if (videoComments.isEmpty()) {
                    System.out.println("Can't get video comments.");
                    return;
                } else {
                    for (CommentThread videoComment : videoComments) {
                        CommentSnippet snippet = videoComment.getSnippet().getTopLevelComment()
                                .getSnippet();
                        String commentText = snippet.getTextDisplay();
                        commentText = commentText.replaceAll("\D+", "");
                        if (commentText.length() < 6 && commentText != null && !commentText.isEmpty()) {
                            System.out.println(commentText);
                            int x = Integer.parseInt(commentText);
                            array[x] = true;
                        }
                    }
                    parameters.put("nextPageToken", response.getNextPageToken());
                }
            }
        } catch (GoogleJsonResponseException e) {
            e.printStackTrace();
            System.err.println("There was a service error: " + e.getDetails().getCode() + " : " + e.getDetails().getMessage());
        } catch (Throwable t) {
            t.printStackTrace();

        }
    }