Category: jPDFProcess: Create/Manipulate PDFs

Q: I read that jPDFProcess includes the functionality found in many of Qoppa’s individual libraries. What does that mean exactly? A: The following libraries are included in the distribution and licensing of jPDFProcess: jPDFAssemble jPDFFields jPDFImages jPDFPrint jPDFSecure jPDFText These libraries all derive from the main library jPDFProcess and were packaged separately to make it […]

This Java program merges two PDF files into a single one using Qoppa’s PDF library jPDFProcess. // Load the two documents PDFDocument pdfDoc1 = new PDFDocument ("input1.pdf", null); PDFDocument pdfDoc2 = new PDFDocument ("input2.pdf", null);   // Append the second document to the first one pdfDoc1.appendDocument(pdfDoc2);   // Save the merged document pdfDoc1.saveDocument ("output.pdf");// Load the […]

Q: Can Qoppa’s Java PDF library, jPDFProcess, create linearized PDF documents and save existing PDF documents as linearized? A: Yes, jPDFProcess can create linearize PDF documents. To linearize a PDF document with jPDFProcess, 2 simple lines of code do the trick: PDFDocument myPDF= new PDFDocument(“file.pdf”); myPDF.saveDocumentLinearized(new FileOutputStream(“linearizedfile.pdf”));PDFDocument myPDF= new PDFDocument(“file.pdf”); myPDF.saveDocumentLinearized(new FileOutputStream(“linearizedfile.pdf”)); What is PDF linearization and why […]

Q: Is there a way to save a PDF optimized for web reading in a way that the the 1st pages of a PDF can be displayed immediately to the user screen while the rest of the PDF continues loading? A: You can use our PDF library jPDFProcess to save PDF documents as “linearized”. Linearized documents contain […]

Q: How can I generate a PDF document from overlaying one PDF document on another? We’re trying to overlay our company’s letterhead onto existing documents. A: Our Java PDF library jPDFProcess can overlay one document on top of another. The function to look at is called appendPageContent and is found at the PDFPage level. Note that the […]

Q: Where can I find jPDFProcess javadoc API? A: You can find the API specification for the latest version of our library jPDFProcess on our website at this link. jPDFProcess is a java library to modify and manipulate PDF documents in Java.

Links are saved as part of the annotations in a PDF document even though they are not really considered annotations. Links in a PDF document do not specifically have a destination.  Instead, they are more general, they hold a list of actions that can really be anything. We define actions that we support in the com.qoppa.android.pdfViewer.actions […]

This java program create a single page PDF document and adds 3 embedded files within the PDF document as file attachments usinghttp://www.qoppa.com/files/pdfprocess. http://www.qoppa.com/pdfprocess/guide/sourcesamples/FileAttachments.java

This Java program adds a semi-transparent watermark to a PDF document using Qoppa’s library jPDFProcess. You can change the watermark string, the font and size, the color, the location (x, y) and the rotation. // Load PDF document PDFDocument pdfDoc = new PDFDocument ("input.pdf", null);   // Font is Helvetica 64 Font wmFont = PDFGraphics.HELVETICA.deriveFont(64f);   […]

This Java programs adds a bookmark for every page in a PDF document using Qoppa’s library jPDFProcess. // Load the document PDFDocument pdfDoc = new PDFDocument ("input.pdf", null);   // Get the root bookmark, create one if necessary Bookmark rootBK = pdfDoc.getRootBookmark(); if (rootBK == null) { rootBK = pdfDoc.createRootBookmark (); }   // Add a […]

This Java program creates a table of contents at the head of the document using Qoppa’s PDF library jPDFProcess. This sample adds a page at the top of the document and then adds a page title and a link to every page in the document. Click here to view the java code.