What it's this? Am I missing something ?

$ java -version
libgcj-java-placeholder.sh

This script is a placeholder for the /usr/bin/java
master link required by jpackage.org conventions. libgcj's
rmiregistry, rmic and jar tools are now slave symlinks to these
masters, and are managed by the alternatives(8) system.

This change was necessary because the rmiregistry, rmic and jar tools
installed by previous versions of libgcj conflicted with symlinks
installed by jpackage.org JVM packages.
gij (GNU libgcj) version 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)

Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

That all depends, what are you trying to do? It seams as though the only java system you have installed on that machine in the Java front end for GCC.

I'd recommend installing Java SDK or JRE from sun and replace /usr/bin/java and /usr/bin/javac to link to the new java and javac.

I don't want to argue with csfalcon here, but you also might want to check out the Blackdown-SDK if you are doing Linux java instead of the Sun SDK. The Blackdown SDK is 100% compatible with Sun's and in my experience a boat load more stable and better performing on Linux then Sun's.

Course, I know some people that love the Gnu Java Compiler, but I've never had much luck with getting my projects that work on Blackdown/Sun to mesh well with gjc.

No argument here I might give blackdown-SDK a try and play around with it. Hope it is as good as you say it is.