Aspose.PDF.Kit for Java is a Java Pdf document manipulating component which allows developers to Edit the existing pdf documents, such as appending and inserting pages, concatenating two pdf documents, splitting one file into two sub-files; Show and change the meta information of a pdf file, the information retrieved and changed involves Title, Subject, Keywords, Author, etc; Add Logo and watermark on the each page, the logo is a string of chars, the watermark is a print in Jpg, Gif or Png format; Encrypt or decrypt a pdf file with owner or users password, the owner can change password and reset the security setting.