extending BufferedImage

Question

Why does the following code show a black image instead of the picture? How to properly extend BufferedImage?

class SizeOfImage {

    public static void main(Str         


        

Answer 1

Probably because the downloaded image bi is never drawn onto the cstImg.

This line:

CustomImg cstImg = new CustomImg(bi.getWidth(), bi.getHeight(), bi.getType());

creates a new image based on the width, height and type of bi... not the content of bi. For that you probably want to do something like

cstImg.getGraphics().drawImage(bi, 0, 0, null);