dcsimg

How do I discover the size of an image file (GIF or JPEG) on disk?

Created May 4, 2012

Alex Chaffee

First, load the image. If you have Swing, you can use 

    ImageIcon icon = new ImageIcon(args[0]);
    Image image = icon.getImage();
If you do not have Swing, you will need access to a toolkit, a component, and a media tracker. See "How do I make sure an Image is loaded before I try to display it?"http://www.jguru.com/jguru/faq/view.jsp?EID=20617

Once you have loaded the image, you can use its getHeight() and getWidth() methods, which work as expected.