Java tutorial
import java.io.FileOutputStream; import com.lowagie.text.pdf.PdfCopyFields; import com.lowagie.text.pdf.PdfReader; public class ConcatenateFormsPDF { public static void main(String[] args) { try { PdfReader reader1 = new PdfReader("SimpleRegistrationForm.pdf"); PdfReader reader2 = new PdfReader("SimpleRegistrationForm.pdf"); PdfCopyFields copy = new PdfCopyFields(new FileOutputStream("ConcatenateFormsPDF.pdf")); copy.addDocument(reader1); copy.addDocument(reader2); copy.close(); } catch (Exception e) { e.printStackTrace(); } } }