List<PDPage> pages = pdDoc.getDocumentCatalog().getAllPages();

if(pages.size() > 0){
    PDJpeg img = new PDJpeg(pdDoc, in);
    PDPageContentStream stream = new PDPageContentStream(pdDoc,pages.get(0));
    stream.drawImage(img, 60, 60);
    stream.close();
}

PDPageContentStream stream = new PDPageContentStream( pdDoc, pages.get(0));

PDPageContentStream stream = new PDPageContentStream( pdDoc, pages.get(0), true, true);

doc = PDDocument.load( inputFileName );
PDXObjectImage ximage = null;
ximage = new PDJpeg(doc, new FileInputStream( image )
PDPage page = (PDPage)doc.getDocumentCatalog().getAllPages().get(0);
PDPageContentStream contentStream = new PDPageContentStream(doc, page, true, true);
contentStream.drawImage( ximage, 425, 675 );
contentStream.close();

PDPage page = new PDPage();
    outputdocument.addPage(page);
    PDPageContentStream contentStream = new PDPageContentStream(outputdocument, page, AppendMode.APPEND, true);
    PDImageXObject pdImageXObject = JPEGFactory.createFromImage(outputdocument, out);
    contentStream.drawImage(pdImageXObject, 5, 2, 600, 750);
    contentStream.close();