ITEXT-CENTER, itext-underline

itext-under-line add a new line

paragraph = new Paragraph("____________________________________________________________________________________", font11); 
paragraph.setAlignment(Element.ALIGN_CENTER); 
document.add(paragraph);


itext-center

paragraph = new Paragraph("PURCHASE ORDER NO. ", font14b); 
paragraph.setAlignment(Element.ALIGN_CENTER); 
document.add(paragraph);