Total de paginas no rtf usando iText-rtf

Document document = new Document();
            RtfWriter2.getInstance(document, new FileOutputStream("TotalPageNumber.rtf"));

            // Create a new Paragraph for the footer
            Paragraph par = new Paragraph("Page ");

            // Add the RtfPageNumber to the Paragraph
            par.add(new RtfPageNumber());
            
            // Add the RtfTotalPageNumber to the Paragraph
            par.add(" of ");
            par.add(new RtfTotalPageNumber());
            
            // Create an RtfHeaderFooter with the Paragraph and set it
            // as a header for the document
            RtfHeaderFooter header = new RtfHeaderFooter(par);
            document.setHeader(header);
            
            document.open();

            for(int i = 1; i <= 300; i++) {
                document.add(new Paragraph("Line " + i + "."));
            }

            document.close();