In this how-to tutorial, we explain to you the step-by-step process to compare PDF files using Java. You do not need to install any third-party software and quickly develop the capability for PDF comparison in Java by consuming a few API calls. Here you can find complete instructions and functional example for comparing PDF documents.

Steps to Compare PDF Files using Java

1. Install GroupDocs.Comparison for Java from the Maven repository
2. Add a reference to the essential classes for performing PDF comparison using Java
3. Create an instance of the Comparer class and pass the source PDF file to its constructor
4. Call the add method of the Comparer class and specify the target file path to compare PDF documents using Java
5. Finally, call the compare method and pass the resultant file path

We have created the above steps for comparing two PDF files for differences using Java. You just need to follow these points in a sequence to start developing the functionality to compare two PDF files in Java. Moreover, these instructions can be used on platforms including MS Windows, Linux, and Mac OS.

Code to Compare PDF Files using Java

In the preceding example, you can see the Java code to compare two PDF files. We have developed a sample code for performing the comparison of two PDF documents. However, you may add more documents for comparison by repeating step 4 in the code. You can also use various other document formats for comparisons such as DOCX, XLSX, PPTX, VSDX, ODT, PNG, and many more.