The AccessibleIcon interface should be supported by any object that has an associated icon (e.g., buttons).

  The AccessibleIcon interface should be supported by any object
that has an associated icon (e.g., buttons). This interface
provides the standard mechanism for an assistive technology
to get descriptive information about icons.
Applications can determine
if an object supports the AccessibleIcon interface by first
obtaining its AccessibleContext (see
Accessible) and then calling the
AccessibleContext.getAccessibleIcon() method.
If the return value is not null, the object supports this interface.