Relevance of JavaSound and JMF and I'm on Google!

Working on the second assignment of the lecture ITM in which we process audio and video data with Java Sound and Java Media Framework (JMF), I was curious (as always) how relevant the technology is we're taught.

Taking a look at the official documentation's date wasn't very promising, stating that it said Last Updated October 24, 2001. Neither was the corresponding paragraph in Java ist auch eine Insel where the author linked to this 6 year old post.
So it seems Java Sound is tremendously outdated. And we're learning how to use it? Great ...

Regarding JMF, isn't any better either: although it's pretty much up-to-date for itself (being maintained, that is to say) it's codec support is more than an insult to developers trying to accomplish anything useful, not to mention being cross-platform (see supported formats list).
I admit, building a cross-platform multimedia framework is a challenging and one might even say indomitable task, but why not use existing frameworks like GStreamer or DirectShow etc.?

From the developer's perspective there are some alternatives one should consider, including:

I'm on Google

Having started an article about Java Sound in my high school years I was surprised to find this (not at all relevant information containing) article being 11th on the Google search results.