audio app classpath question

[Heitzso]

I have 4.1 snapshot (not latest/greatest, but less than 2 weeks old)
compiling my gcj/swt/freetts app.  The app runs fine until I try to
get a sound line via
    AudioSystem.java -> Mixer.java

I believe the function being called in Mixer.java is:
    mix.getLine(info);
from AudioSystem.java.  But getLine(info) in Mixer.java is:
    Line getLine(Line.Info info) throws LineUnavailableException;
and that's all!

I assume the function is not implemented in the 4.1 snapshot I have
though I am not familiar with the truncated way that function is written.

Could someone please confirm with a simple "YES, NOT IMPLEMENTED"

Also, I'd appreciate any comment re value (or problems) of trying to 
grab the
classpath source straight from cvs/svn and slipping it into my gcc source
tree and recompiling gcc 4.1. 

Another option would be to grab 4.2 snapshot, etc.

??

Thanks,
Heitzso