jPDFProcess is a Java library that can read, modify and then save or print PDF documents. With jPDFProcess, you can customize and deliver PDF documents to your customers from web servers or standalone applications. jPDFProcess can work with existing PDF documents to be modified, merged with other documents, or it can create brand new PDF documents from scratch.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.