Is possible parse the DOCTYPE with Jsoup to discover HTML version?

Question

I want to parse the DOCTYPE of a page with Jsoup to discover the version of HTML (HTML 5, HTML 4, XHTML, etc.).

Is possible to parse the DOCTYPE with Jsoup to handle it? If not is, there is a way to achieve the main objective that is discovering the version of page HTML?

Answer 1

Jsoup has DocumentType class for this purposes:

List<Node>nods = doc.childNodes();
         for (Node node : nods) {
            if (node instanceof DocumentType) {
                DocumentType documentType = (DocumentType)node;
                  System.out.println(documentType.toString());
                  System.out.println(DocumentType.attr("publicid"));
            }
        }