Wouldn't it be nice if, in the JDK documentation for the Core API, for
each Class, Abstract Class, and Interface, that along with the "Field
Index" and "Method Index", there were an "Inheritance Index" that
listed (in italics?) all of the methods and fields that it had
inherited by extending/implementing its superclass, etc...

We already have this to some extent in:

Hashtable
...
put()
Overrides: put in class Dictionary

- but it's not clear to me whether methods which are not overridden
are listed, and it might aid clarity if an index of such was available
as a separate, hyperlinked part of the document.