iText is a library for creating and manipulating PDF files in Java. It was written by Bruno Lowagie, Paulo Soares, and others.
iText
In a previous post I looked at why you might want to convert a PDF file to an image (you can use JPedal to... From a practical point of view you need one of two sort of files in order to sign something. Either a keystore file or... I came across an interesting issue with PDF Text fields while debugging a file this week. We were sent a 2 page document created... 
