Java tutorial
import java.awt.Image; import java.awt.Rectangle; import java.awt.Toolkit; import java.awt.image.ImageObserver; public class MainClass { public static void main(String[] args) { ImageObserver myObserver = new ImageObserver() { public boolean imageUpdate(Image image, int flags, int x, int y, int width, int height) { if ((flags & HEIGHT) != 0) System.out.println("Image height = " + height); if ((flags & WIDTH) != 0) System.out.println("Image width = " + width); if ((flags & FRAMEBITS) != 0) System.out.println("Another frame finished."); if ((flags & SOMEBITS) != 0) System.out.println("Image section :" + new Rectangle(x, y, width, height)); if ((flags & ALLBITS) != 0) System.out.println("Image finished!"); if ((flags & ABORT) != 0) System.out.println("Image load aborted..."); return true; } }; Toolkit toolkit = Toolkit.getDefaultToolkit(); Image img = toolkit.getImage(args[0]); toolkit.prepareImage(img, -1, -1, myObserver); } }