RTF to HTML Converter (Performance Problem)

Question

Hi there,
I've got a big performance problem in my RTF to HTML converter. The converter takes for instance 1300 characters up to 4 seconds.... overkill
Here is my code:
final RTFEditorKit rtf_edit = new RTFEditorKit();
final JTextPane jtp_rtf = new JTextPane();
final JTextPane jtp_html = new JTextPane();
final StyleContext rtf_context = new StyleContext();
final DefaultStyledDocument rtf_doc = new DefaultStyledDocument(rtf_context);
jtp_rtf.setEditorKit(rtf_edit);
jtp_rtf.setContentType("text/rtf");
jtp_html.setContentType("text/html");
try {
     rtf_edit.read(new StringReader(txt), rtf_doc, 0);
     jtp_rtf.setDocument(rtf_doc);
     jtp_html.setText(rtf_doc.getText(0, rtf_doc.getLength()));
     HTMLDocument html_doc = null;
     for (int i = 0; i < rtf_doc.getLength(); i++) {
          AttributeSet a = (AttributeSet) rtf_doc.getCharacterElement(i)
                    .getAttributes();
          AttributeSet p = (AttributeSet) rtf_doc.getParagraphElement(i)
                    .getAttributes();
          String s = jtp_rtf.getText(i, 1);
          jtp_html.select(i, i + 1);
          jtp_html.replaceSelection(s);
          html_doc = (HTMLDocument) jtp_html.getDocument();
          html_doc.putProperty("", "");
          html_doc.setCharacterAttributes(i, 1,
                    (javax.swing.text.AttributeSet) a, false);
          MutableAttributeSet attr = new SimpleAttributeSet(p);
          html_doc.setParagraphAttributes(i, 1, attr, false);
     StringWriter writer = new StringWriter();
     final HTMLEditorKit html_edit = new HTMLEditorKit();
     html_edit.write(writer, html_doc, 0, html_doc.getLength());
     return writer.toString();
} catch (Exception ex) {
     return " ";
}Thanks for any advice

Answer 1

Can you post code of your HTML page.. Thanks