It seems you're asking if you can run Javadoc 1.4 on source code developed with JDK 1.3. Yes, that works well. In fact, that's
the best way to use Javadoc, as later versions have more features
and fewer bugs. Javadoc is designed to run on its version (1.4)
or earlier (1.3, 1.2, 1.1, 1.0) of source code.
-Doug Kramer
Javadoc team