When rendering or optimizing images with a CMYK color space (DeviceCMYK), Qoppa’s PDF libraries and components need the cmykProfile.jar to be present in the classpath. If you forget to include this jar, you will get images with “weird” colors. Faces for instance will show with more intense, bright saturated colors (such as red and blue) […]
Category: jPDFProcess: Create/Manipulate PDFs
Developer library to create, print and manipulate PDF documents in Java. This library encompasses the functionality found in most of our other libraries.
Create a PDF with a page and draw text and image on it using jPDFProcess
Sample program showing how to create a PDF using jPDFProcess. You first create a PDF, add a page to it then use the Graphics object form the page to draw onto it. On the page we draw text and an image. In this little snippet, the compression used for the image within the PDF document […]
Clear and delete signature fields in a PDF document using Java
This is sample Java program showing how to clear and delete signature fields in a PDF using Qoppa’s PDF library jPDFProcess. The jPDFProcess’ public API does not give a direct access to deleting fields in a PDF, but when deleting widgets which are the annotation associated with a field on a PDF page, it will […]
Search Text and Add Text Highlights & Markups in a PDF document
This java sample shows how to search text in a PDF and add text highlights or text markup annotations (underline, strikeout, squiggly) on top of the text using Qoppa’s PDF library jPDFProcess. // Open the document PDFDocument inDoc = new PDFDocument ("c:/input.pdf", null); // Loop through the pages, searching for text for (int pageIx […]
Filling field data in a PDF form programmatically with Java
To fill in the fields with data, you can use the getField() method to get a field by field name and then use the setValue() method to set the data. To set values in combo boxes and list fields, use values from the field’s export options and not the display options. To save the PDF […]
Search text in a PDF and add hyperlinks on top of the text found
This Java sample shows how to search text in a PDF document and add link annotations (that go to a specific URL) on top of the text occurrences found. This sample uses Qoppa’s PDF library jPDFProcess. // Load the document PDFDocument pdfDoc = new PDFDocument ("C:\\myfolder\\input.pdf", null); // this is my search label that […]
Search Labels and Redact Text in a PDF
This Java sample shows how to search a text label within a PDF document and then remove the text following that label. This is done by adding a redaction annotation and burning it which remove any content below the redaction annotation. This sample is using Qoppa’s PDF library jPDProcess In the sample code below, we’re […]
Setting / Editing PDF Document Properties & Metadata including Title, Subject, Author, Keywords
After creating or assembling a PDF document, it is a important to set or edit the meta data. Qoppa Java libraries jPDFAssemble and jPDFProcess can edit document properties and xml metadata such as title, author, subject and keywords. The sample java code below shows how to open a PDF, edit the document properties and then […]
Code Sample: Add Redaction Annotation to PDF, Export to XFDF, Import from XFDF
Here is a sample java program showing how to add a redaction annotation to a PDF document, export them as xfdf and then re-import them into another PDF document using Qoppa library jPDFProcess. // create a new PDF and append a page to it PDFDocument doc1 = new PDFDocument(); PDFPage page1 = doc1.appendNewPage(72 * 8.5, […]
Sample Java program to add layers to a PDF and add content onto the layers using jPDFProcess
Sample Java program showing how to add layers to a PDF document and to draw content on the new layers. jPDFProcess can draw onto new or existing layers, on new or existing documents / pages. // Create a new document PDFDocument pdf = new PDFDocument(); // Add a blank page to the document PDFPage […]
Deleting all bookmarks from a PDF document
To delete all bookmarks in a PDF document, simply create a new empty root bookmark. With jPDFProcess, use PDFDocument.createRootBookmark(); With jPDFAssemble, use PDFAssemble.createRootBookmark(); With jPDFEditor, use PDFEditorBean.getDocument().createRootBookmark(); Here is sample code to do so: // Load the document PDFDocument pdfDoc = new PDFDocument ("input.pdf", null); // Get the root bookmark, create one if necessary Bookmark […]
Clear Password and Permissions in a PDF document
It is possible to clear permissions and passwords in a PDF document using several of Qoppa’s Java PDF libraries and components. With jPDFSecure, use PDFSecure.clearPasswordPermissions() With jPDFProcess, use PDFDocument.clearPasswordPermissions() With jPDFEditor, use PDFEditorBean.getDocument().clearPasswordPermissions() Calling PDFSecure.clearPasswordPermissions will clear all password permissions for this document: it will reset all password permissions to true. it will clear open/user […]
Changing PDF Document Permissions and Passwords
It is possible to set / update permissions and passwords in a PDF document using several of Qoppa’s Java PDF libraries and components. Call to change document permissions and passwords depending on which Qoppa library you use: // with jPDFSecure PDFSecure.setPasswordPermissions(newPermPwd, newOpenPwd, permissions, currentPermPwd, encryptType); // with jPDFProcess PDFDocument.setPasswordPermissions(newPermPwd, newOpenPwd, permissions, currentPermPwd, encryptType); […]
How to Resolve Error Rendering Page: Missing Font
When rendering a PDF document in the following Qoppa’s PDF library products: jPDFImages, jPDFPrint, jPDFProcess, jPDFViewer, jPDFNotes or jPDFEditor, you might encounter a blank page with an “Error Rendering Page” displayed in red on a page. This error happens when there is an issue with a font within the PDF document. There are 2 possible […]
Fill / Populate XFA Dynamic Form with Field Data in Java
Here is a sample Java program that can load a dynamic XFA form, fill in data from an XDP or XML file and then saved the filled form. This sample is using Qoppa’s PDF library jPDFFields. It could be simply adapted to use jPDFProcess library by replacing PDFFields with PDFDocument. import com.qoppa.pdfFields.PDFFields; public class […]
Copying pages from one PDF to another PDF in Java
Here is a sample Java program that shows how to copy pages from one PDF document to another using Qoppa’s PDF library jPDFProcess. The sample can be adapted to work with Qoppa’s jPDFAssemble by simply replacing the class “PDFDocument” with “PDFAssemble”. In this sample, we’re copying the pages from an existing PDF to a new […]
Export PDF to PNG Image with Overprint Simulation
This Java sample below shows how to use Qoppa’s jPDFImages (or jPDFProcess) to load a PDF and export it to an image in PNG format with overprint simulation on. First, the image is rendered in CMYK profile, then converted to RGB using ColorConvertOp and finally saved as PNG (or JPEG). The resolution is set at […]
On using Java RenderingHints to smooth jagged edges on rotated images
Q: There seems to be some pixelation or resolution issue when rendering specific images in a PDF brochure. Is there anything that can be done to render these images more smoothly? A: Qoppa’s PDF libraries and components uses our own interpolation algorithm that works much better than the built-in Java algorithm well both when up-sampling […]
Is it possible to send CAC certificates to the server for digital signature?
Q: We are developing a webserver solution which will be deployed on Internet Explorer for digitally signing PDF documents. We need to sign using the certificate on the users CAC Card. Is it possible to get the certificate from the client to the server for signature? A: If you are using a hardware device for […]
Getting information about the annotations contained in each page of a PDF document
Annotations are stored in a vector within each page of a PDF document. Here is sample code to loop through annotations contained in each page and output information about each annotation including annotation type, creator, date modified, color, bounds using Qoppa’s Java library jPDFProcess. This code can be adapted to work with Qoppa’s PDF components, […]
List of Supported JavaScript Events in Qoppa PDF Components
Here is the list of supported JavaScript events in Qoppa PDF Library and Component Products. Doc/Open Field/Keystroke Field/Validate Field/Calculate Field/Format Field/Focus Field/Blur Field/MouseEnter Field/MouseExit Field/MouseUp Field/MouseDown
List of Supported JavaScript Actions in Qoppa PDF Components
Here is the list of supported actions in Qoppa’s PDF Library and Component Products. The table below lists the JavaScript actions, where they live in the PDF document and if they are supported or not. Parent Dictionary Entry Supported/Unsupported Document Level: Names (in the Catalog dictionary) JavaScript Supported Catalog OpenAction Supported AA (additional actions […]
List of Supported JavaScript Objects / Methods / Properties in Qoppa PDF Components
Here is a list of all objects, methods and properties supported in Qoppa’s PDF Library and Component Products. This list was compiled for v2016R1. App Methods: alert beep openDoc popUpMenu popUpMenuEx response setTimeOut trustedFunction Properties: formsVersion viewerType viewerVersion Color Methods: equal Properties: black blue cyan dkGray gray green ltGray magenta red transparent white yellow Console […]
Extract Images from PDF Document using Java
Q: How can I export all the images contained in a PDF document? A: Here is a sample Java code to list all images embedded in a PDF document and save / export them using Qoppa’s jPDFProcess library. This example shows how to save the images in png format but it can simply be changed […]
List Resource Fonts in a PDF document
Q: How can I list all the resource fonts in a PDF document? A: Here is a sample Java code to list all fonts referenced in a PDF document using Qoppa’s jPDFProcess library. Some fonts may only be referenced by name and other fonts may be embedded in the document. In version v2016R1, a new […]
Rotate Pages in a PDF document using Java
This Java sample code will open a PDF and rotate each page of the document by a 180 degrees. It then prints and saved the rotated PDF document to a different file. This sample uses jPDFProcess, Qoppa’s Java PDF library to manipulate PDF documents. package jPDFProcessSamples; import com.qoppa.pdf.PrintSettings; import com.qoppa.pdfProcess.PDFDocument; import com.qoppa.pdfProcess.PDFPage; public […]
Create and add PDF annotations to a PDF document with jPDFProcess
Here is a sample Java program showing how to create and add annotations such as square, rubber stamp, typewriter, callout and free text to a PDF document using Qoppa’s PDF library jPDFProcess. The annotations are added to the first page of a PDF document. A first PDF is saved with all the annotations and a […]
Invalid CMAP name when rendering or printing a PDF page
Q: When opening a PDF file, I get the following error: A: You are missing cmaps.jar in your classpath which contains CMaps, used to read and display character encodings used with CJK (Chinese, Japanese, Korean) content. Download cmaps.jar This error can happen when rendering PDF documents in Qoppa’s PDF components (jPDFViewer, jPDFNotes, jPDFEditor) or […]
Staple and Duplex options when printing PDF in Java
Q: Is it possible to specify staple & duplex options on a per-document basis with jPDFPrint? A: Yes, it is: Java supports setting print job attributes for each print job, this is done through PrintRequestAttribute objects. jPDFPrint supports passing these attributes through. The attributes that you want to use are: javax.print.attribute.Finishings.STAPLEjavax.print.attribute.Finishings.STAPLE and javax.print.attribute.Sides.DUPLEXjavax.print.attribute.Sides.DUPLEX Here is a sample […]
Create PDF Redaction Annotations and Burn / Apply Redaction Annotations Programmatically
Here is some Java sample code to add a new redaction annotation and then burn / apply it on a page of a PDF document using Qoppa’s PDF library jPDFProcess. Java Library to Add & Burn Redaction Annotations: jPDFProcess can redact text, images and shapes / path commands in PDF documents, it is extremely sophisticated […]
