[Libreoffice] LibreOffice and Java

Hi all.

There's a thing not clear to me and that involved go-oo too: the 
relationship between LibreOffice and Java. Here i'm referring to the 
Windows environment but under Linux/Mac should be the same.

Is it Java a requirements or it is considered an optional component?
If Java isn't installed the user can see many warnings and some part of 
the suite doesn't work, but the biggest part works. But Java isn't 
provided with the installer as with OpenOffice...

I'd like to hear your point of view.

Cesare.