How can I convert a PNG file to PDF using java?

Question

Are there any open source libraries that I can use?

Answer 1

itext may help you. you don't really convert a png to pdf but create a pdf with a png in it. simple example:

Document document = new Document(PageSize.A4, 20, 20, 20, 20);
PdfWriter.getInstance(document, new FileOutputStream("C:/test.pdf"));
document.open();
Image image = Image.getInstance(getClass().getResource("/logo.png"));
document.add(image);
document.close();