public int checkImage(Image image, ImageObserver observer) { return checkImage(image, image.getWidth(observer), image.getHeight(observer), observer);
public int checkImage(Image image, ImageObserver observer) { return checkImage(image, -1, -1, observer);
	public int checkImage(Image image, ImageObserver observer) {		return checkImage(image, image.getWidth(observer), image.getHeight(observer), observer);	}