In today’s digital world, effective document management is a must for businesses and individuals alike. Frequently, this means merging several PDF files into a single, well‑organized document to improve accessibility. By leveraging a robust PDF merger library, you can automate the task and streamline your workflow. In this tutorial, we’ll walk you through the complete steps to merge PDF files using Java. First, ensure you have the right tools—a code editor such as IntelliJ IDEA or Eclipse—and that the library is installed in your project. The following guide demonstrates how to combine PDF files in Java.

Steps to Merge PDF files using Java

1. Set up your IDE to use GroupDocs.Merger for Java to merge PDF files
2. Create an instance of the Merger class, providing the file path of the source PDF as a parameter to the constructor
3. Use the Merger.join method to add additional PDF files to be merged. Repeat this step for each PDF document you want to merge
4. Finally, call the Merger.save method, specifying the desired filename for the merged PDF file

In numerous software development projects, there is often a need to manipulate PDF files, whether it’s generating, editing, or merging them. Combining multiple PDF files into a single document is a common requirement in various scenarios, such as report generation and document management systems. The provided instructions are suitable for major operating systems, including Windows, macOS, and Linux, as long as Java is installed. No additional software installations are required to join PDF files using Java.

Code to Merge PDF files using Java

Once you’ve added the recommended merger library and tweaked the file paths to match your environment, incorporating code to merge PDF files in Java into your applications becomes a seamless, hassle‑free experience. In short, the merger library simplifies PDF concatenation: by following the steps outlined above and using the sample code, you can effortlessly combine multiple PDFs into a single document, addressing a wide range of business and development scenarios. Feel free to experiment with different file combinations and configuration options to tailor the solution to your specific needs.

Earlier we walked you through adding a text watermark to DOCX files with Java. To deepen your expertise, be sure to explore our comprehensive guide on how to add text watermark to DOCX using Java.