p23.applyHeading(true, 2);
Paragraph p3 = doc
.addParagraph("3.This is a test paragraph apply with ");
p3.applyHeading();
TextHElement h3 = (TextHElement) p3.getOdfElement();
TextTocMarkElement TextTocMark = h3
.newTextTocMarkElement("TextTocMarkElement");
TextTocMark.setTextOutlineLevelAttribute(2);
h3.newTextNode("Heading ");
TextTocMarkStartElement TextTocMarkStart = h3
.newTextTocMarkStartElement("IMark159230668");