รวมรูปภาพเป็น PDF ใน Java

Presentation pres = new Presentation();
try {
    IPPImage image1 = pres.getImages().addImage(Files.readAllBytes("image1.png"));
    pres.getSlides().get_Item(0).getShapes().addPictureFrame(ShapeType.Rectangle, 0, 0, 100, 100, image1);

    IPPImage image2 = pres.getImages().addImage(Files.readAllBytes("image2.png"));
    pres.getSlides().get_Item(0).getShapes().addPictureFrame(ShapeType.Rectangle, 0, 200, 100, 100, image2);

    pres.save("pres.pdf", SaveFormat.Pdf);
} finally {
    if (pres != null) pres.dispose();
}