This brief guide explains how to redact a PDF in Java. It contains the system configuration details, and stepwise algorithm, followed by a runnable sample code to redact text in PDF using Java. You can customize this code and change the page number or page coordinates to redact any text or image in the PDF document.

Steps to Redact a PDF in Java

1. Configure the system by installing Aspose.PDF for Java to redact a PDF
2. Get input PDF document for redacting it
3. Instantiate an object of RedactionAnnotation class
4. Add the annotation to existing annotations
5. Redact the PDF file with redact() method and export it to the output path

The steps above summarize the algorithm to redact information in PDF using Java. First of all, access the input PDF file and create a redaction annotation. Subsequently, add the annotation to the page and export the output PDF file.

Code to Redact PDF File using Java

This sample code shows how to redact PDF document using Java. It accesses the input document and then creates RedactionAnnotation with the page number and rectangular coordinates. Finally, the annotation features like the fill color, border color, overlay text, etc. are set and the target section is redacted as per your requirements.

This article has covered how to redact a document in Java. If you want to delete a whole page from a PDF then please read the article on how to remove pages from PDF using Java.