How to count number of pages in a PDF file in Java

Welcome, in this tutorial, we will learn how to count the number of pages of a pdf document with Java using Apache PDFBox.

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Prerequisite

• You have to add a pdfbox-app-2.0.25.jar from the download section of the Apache PDFBox website in your Java project
• It is recommended to use Version 2.0.25 of PDFBox.
• You can directly download from here pdfbox-app-2.0.25.jar version 2.0.25

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Code with Explanation

You have to create an object(or instance) of PDDocument and call the getNumberOfPages() method which returns the total number of pages in the document.

import java.io.File;
import java.io.IOException;
import org.apache.pdfbox.pdmodel.PDDocument;

public class ReadPdfPageExample {

    public static void main(String[] args) {

        PDDocument pdfDoc;
        int pageCount = 0;
        try {
            pdfDoc = PDDocument.load(new File("My_Document.pdf"));
            pageCount = pdfDoc.getNumberOfPages;
        } catch (IOException ex) {
            ex.printStackTrace();
        }

        System.out.println("The total number of pages in the pdf is " + pageCount);

    }
}

Output 
The total number of pages in the pdf is 19

Explanation

• It is important to import org.apache.pdfbox.pdmodel.PDDocument.
• In this code, we have to create the reference variable of PDDocument.
• In the try block, we call PDDocument.load() method with a new File object passing in the name of pdf as a string.
• Now using the object of PDDocument pdfDoc we call getNumberOfPages() method which returns the Integer value and stores it in the pageCount variable.
• After the catching exception may throw from the File class.
• Now display the integer value.

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That’s all for a quick review of how to count the number of pages in a PDF file in Java.

Also read: How to generate PDF invoice using Java