How to get an InputStream from a BufferedImage?

Question

How can I get an InputStream from a BufferedImage object? I tried this but ImageIO.createImageInputStream() always returns NULL

BufferedImage bigImage = GraphicsUtilities.createThumbnail(ImageIO.read(file), 300);
ImageInputStream bigInputStream = ImageIO.createImageInputStream(bigImage);

The image thumbnail is being correctly generated since I can paint bigImage to a JPanel with success.

Thank you.

Answer 1

If you are trying to save the image to a file try:

ImageIO.write(thumb, "jpeg", new File(....));

If you just want at the bytes try doing the write call but pass it a ByteArrayOutputStream which you can then get the byte array out of and do with it what you want.