When url is mentioned in the Image JavaDoc ( for example here: http://docs.oracle.com/javafx/2/api/javafx/scene/image/Image.html#Image%28java.lang.String%29 ), it is defined as =>
"Construct an Image which pixels are loaded from the specified url."

The JavaDoc also provides examples such as this one:

// load an image in background, displaying a placeholder while it's loading
// (assuming there's an ImageView node somewhere displaying this image)
Image image1 = new Image("flower.png", true);

However "flower.png" is not a url, but a relative path.
Moreover what this path is relative to is not defined in the documentation.
Testing reveals that (at least in the case of a standalone application), the image is looked up in a path relative to the system property "user.dir". This behaviour was very surprising to me. I would like it better documented.

A related forum discussion is here: https://forums.oracle.com/forums/thread.jspa?threadID=2388109

Additional minor issue is "Construct an Image which pixels are loaded from the specified url." is not grammatically correct.