This tutorial explains how to compare PDF files using Java. It includes details on setting the IDE, a list of steps, and sample code for working with PDF comparison tools using Java. You will learn to compare individual pages or complete PDF files based on your requirements.

Steps to Compare PDF Documents using Java

1. Set the environment to use Aspose.PDF for Java to compare PDF documents
2. Load two PDF files separately into the Document class objects
3. Access the target pages from the collection of pages of both the PDF files for comparison
4. Call the TextPdfComparer.comparePages() method to compare selected pages from both the PDF files
5. Compare complete PDF documents using the TextPdfComparer.compareFlatDocuments() method
6. Save the comparison result into another PDF file using the above method

These steps summarize the process to compare two PDF docs using Java. You may load the two PDF files for comparison and select the individual pages if you want to compare only the selected pages. Finally, call the compareFlatDocuments() method to compare the complete documents or the comparePages() method to compare the selected pages, along with setting the output PDF file name to save the differences.

Code for PDF to PDF Comparison using Java

This code can be used to develop a simple PDF document comparison tool using Java. Use the ComparisonOptions class object to customize the comparison, such as defining the included/excluded rectangular areas during the comparison, setting a flag for excluding tables, and setting the edit operations orders. The EditOperationsOrder enumerator, which has values InsertFirst or DeleteFirst, can be used.

This article has taught us the process to compare two PDFs using Java. If you want to crop a PDF file, refer to the article on how to crop a PDF using Java.