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Add Watermark Image to an Existing PDF File

import java.io.FileOutputStream; import java.util.HashMap; import com.lowagie.text.Element; import com.lowagie.text.Image; import com.lowagie.text.PageSize; import com.lowagie.text.pdf.BaseFont; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfReader; import com.lowagie.text.pdf.PdfStamper; public class AddWatermarkImageToAnExistingPDFFile {     public static void main(String[] args) {         try {             PdfReader reader = new PdfReader("YourOwnPDF.pdf");             int n = reader.getNumberOfPages();             PdfStamper stamp = new PdfStamper(reader, new FileOutputStream("NewPDFWithWatermarkImage.pdf"));             int i = 0;             PdfContentByte under;             Image img = Image.getInstance("logo.png");             img.setAbsolutePosition(200, 400);             while (i < n) {               i++;               under = stamp.getUnderContent(i);               under.addImage(img);             }             stamp.close();         }         catch (Exception de) {             de.printStackTrace();         }     } }                     itext.zip( 1,748 k)