Add Image Stamps to PDF in Java

import com.spire.pdf.annotations.PdfRubberStampAnnotation;
import com.spire.pdf.annotations.appearance.PdfAppearance;
import com.spire.pdf.graphics.PdfImage;
import com.spire.pdf.graphics.PdfTemplate;

import java.awt.geom.Rectangle2D;

public class ImageStamp {

    public static void main(String[] args) {

        //create a PdfDocument object
        PdfDocument doc = new PdfDocument();

        //load a PDF document
        doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\sample.pdf");

        //get the first page
        PdfPageBase page = doc.getPages().get(0);

        //load an image file
        PdfImage image = PdfImage.fromFile("C:\\Users\\Administrator\\Desktop\\quality-control-stamp.png");

        //get the width and height of the image
        int width = image.getWidth();
        int height = image.getHeight();

        //create a PdfTemplate object based on the size of the image
        PdfTemplate template = new PdfTemplate(width, height);

        //draw image on the template
        template.getGraphics().drawImage(image, 0, 0, width, height);

        //create a rubber stamp annotation, specifying its location and position
        Rectangle2D rect = new Rectangle2D.Float((float) (page.getActualSize().getWidth() - width - 50), (float) (page.getActualSize().getHeight() - height - 80), width, height);
        PdfRubberStampAnnotation stamp = new PdfRubberStampAnnotation(rect);

        //create a PdfAppearance object
        PdfAppearance pdfAppearance = new PdfAppearance(stamp);

        //set the template as the normal state of the appearance
        pdfAppearance.setNormal(template);

        //apply the appearance to the stamp
        stamp.setAppearance(pdfAppearance);

        //add the stamp annotation to PDF
        page.getAnnotationsWidget().add(stamp);

        //save the file
        doc.saveToFile("ImageStamp.pdf");
        doc.close();
    }
}