DynamicPDF™ Merger for Java makes simple the task of merging and adding new content to existing PDF documents. It integrates with DynamicPDF™ Generator for Java and can import PDF documents from the file system or any java.io.FileInputStream object that supports reading.
The resulting PDF document can then have content added to it using the Generator for Java object model and can be output to any java.io.OutputStream object, javax.servlet.ServletOutputStream object, or directly to a file on the file system.
The object model is intuitive and easy to learn, yet very flexible allowing PDF merging, stamping, appending, form filling and page placing, rotating and scaling. The Developer Editions offer royalty free distribution of server and client based applications to an unlimited number of servers or workstations.
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.