Java JVM: GNU libgcj versus Sun

[Bruno Costacurta]

Hello,

it seems that by default Ubuntu is deployed with GNU libgcj as a Java JVM.

However I encountered few applications that do not work with it (ie. Oxygen 
XML Editor, MagicDraw UML, it seems Eclipse too..) which I corrected by 
specifying to each of these applications to use the Sun JVM previously 
installed manually ('manually' meaning as opposition to 'packaging').

Questions :
- is it possible to remove the GNU libgcj package(s) under Ubuntu (I use 
Kubuntu Dapper 6.06) ?
- if yes : which package(s) should be removed ?

Note: prerequisites of removal are:
- Sun JVM installed
- environment setups completed (PATH..etc..)
- .. other ?

Cheers.
Bye,
Bruno