The second paragraph of the "Requesting Focus" section of the Focus Spec at http://java.sun.com/javase/6/docs/api/java/awt/doc-files/FocusSpec.html#RequestingFocus states: "The request will also be denied if the Component's top-level Window is not the focused Window and the platform does not support requesting focus across Windows."

We would like to see an API added to JDK 7 to determine if requesting focus across windows is supported.