This sample will read a PDF file that contains Stamps looking for one with a specific name and then apply it to a PDF file in the same way that Acrobat does.

UsingAcrobatStamps.java

/*
 * Copyright Datalogics, Inc. 2015
 */

package pdfjt.cookbook.stamps;

import com.adobe.internal.io.ByteReader;
import com.adobe.internal.io.ByteWriter;
import com.adobe.internal.io.InputStreamByteReader;
import com.adobe.pdfjt.pdf.document.PDFDocument;
import com.adobe.pdfjt.pdf.document.PDFOpenOptions;
import com.adobe.pdfjt.pdf.document.PDFSaveFullOptions;
import com.adobe.pdfjt.pdf.graphics.xobject.PDFXObjectForm;
import com.adobe.pdfjt.pdf.interactive.annotation.PDFAnnotationStamp;
import com.adobe.pdfjt.pdf.interactive.annotation.PDFAppearance;
import com.adobe.pdfjt.pdf.page.PDFPage;
import com.adobe.pdfjt.services.manipulations.PMMTemplates;
import com.adobe.pdfjt.services.xobjhandler.PageContentXObject;
import com.adobe.pdfjt.services.xobjhandler.XObjectContentType;
import com.adobe.pdfjt.services.xobjhandler.XObjectUseOptions;

import java.io.InputStream;
import java.net.URL;

import pdfjt.util.SampleFileServices;

/**
 * This sample will read a PDF file that contains Stamps looking for one with a
 * specific name and then apply it to a PDF file in the same way that Acrobat
 * does.
 */
public class UsingAcrobatStamps {

    private static final String inputPDF = "http://dev.datalogics.com/cookbook/stamps/BlankInput.pdf";
    private static final String standardStampsPDF = "http://dev.datalogics.com/cookbook/stamps/StandardBusiness.pdf";
    private static final String outputDir = "cookbook/Stamps/output/";

    static public void main(String[] args) throws Exception {
        try {
            /*
             * Start by reading in the two input files
             */
            InputStream fis = new URL(inputPDF).openStream();
            ByteReader byteReader = new InputStreamByteReader(fis);
            PDFDocument pdfDocument = PDFDocument.newInstance(byteReader, PDFOpenOptions.newInstance());

            fis = new URL(standardStampsPDF).openStream();
            byteReader = new InputStreamByteReader(fis);
            PDFDocument stampsPDF = PDFDocument.newInstance(byteReader, PDFOpenOptions.newInstance());

            // Get the first page of the PDF that we want to add the stamp to.
            PDFPage pageOne = pdfDocument.requirePages().getPage(0);

            /*
             * Get the page with the template name that matches the
             * "Confidential" stamp in the Acrobat UI.
             */
            PMMTemplates pmmTemplates = new PMMTemplates(stampsPDF);
            PDFPage confidentialStampPage = pmmTemplates.templateExistsForName(stampsPDF, "SBConfidential=Confidential");

            /*
             * We are going to use pages from the "StandardBusiness.pdf" that
             * ships with Adobe Acrobat as the Stamp Appearance. We can pull
             * content from other PDF files by encapsulating the page content
             * stream (with the associated Resources dictionary) in an XObject.
             * For Stamps we don't need any special kind of XObject type so we
             * just use "General".
             */
            XObjectUseOptions useOptions = new XObjectUseOptions();
            XObjectContentType xObjectContentType = XObjectContentType.General;
            useOptions.setContentType(xObjectContentType);

            // Create the Stamp Annotation Object.
            PDFAnnotationStamp pdfAnnotationStamp = PDFAnnotationStamp.newInstance(pdfDocument);
            PDFAppearance pdfAppearance = PDFAppearance.newInstance(pdfDocument);

            /*
             * Create an XObject from the page that has the stamp that we want,
             * and then set it as the normal appearance for the stamp
             * annotation.
             */
            PDFXObjectForm approvedStampXObjectForm = PageContentXObject.generateContentXObject(pdfDocument, confidentialStampPage, useOptions);
            pdfAppearance.setNormalAppearance(approvedStampXObjectForm);
            pdfAnnotationStamp.setAppearance(pdfAppearance);

            /*
             * Add a Title and Content for the Stamp Pop-Up. These strings will
             * appear in the Acrobat Comments panel and when you roll over the
             * Stamp.
             */
            pdfAnnotationStamp.setTitle("Datalogics");
            pdfAnnotationStamp.setContents("My Confidential Stamp");

            /*
             * Set the location of the Stamp to be one inch from the top, left
             * of the page.
             */
            double stampWidth = approvedStampXObjectForm.getBBox().width();
            double stampHeight = approvedStampXObjectForm.getBBox().height();
            double llx = 72;
            double lly = (pageOne.getCropBox().height() - 72 - stampHeight);
            double urx = 72 + stampWidth;
            double ury = pageOne.getCropBox().height() - 72;
            pdfAnnotationStamp.setRect(llx, lly, urx, ury);

            // Add the Stamp Annotation to the page
            pageOne.addAnnotation(pdfAnnotationStamp);

            // Save the file.
            SampleFileServices.createDir(outputDir);
            ByteWriter outputFile = SampleFileServices.getRAFByteWriter(outputDir + "StampedDocument.pdf");
            pdfDocument.save(outputFile, PDFSaveFullOptions.newInstance());

        } finally {
            //
        }
    }

}