Just install

Code:
apt-get install libstdc++2.9-glibc2.1
Jbuilder uses it's own sdk (sun) an this needs the above library - and it works. So this problem appears with ALL swing applications bundled with this java version and manufactor. The apt-get command sets also the approprate link in /usr/lib.

...AND fixed one other Problem in Debian, which you can use for every java-environment (f.e. the "jikes" compiler ).

How to add anew jdk / sdk ...

Under Debian (as root !), you can switch the default java-version via
Code:
update-alternatives --config java
To add a new alternative, you have to use the option
Code:
update-alternatives --install <link> <name> <path> <priority>
For my use, i wrote a little script, that does this job:
Code:
update-alternatives \
--install \
/usr/bin/javac javac /home/yourUserName/JBuilder9/jdk1.4/bin/javac 500 \
--slave \
/home/yourUserName/JBuilder9/jdk1.4/man/man1/javac.1 javac.1 /home/yourUserName/JBuilder9/jdk1.4/man/man1/javac.1

update-alternatives \
--install \
/usr/bin/java java /home/yourUserName/JBuilder9/jdk1.4/bin/java 500 \
--slave \
/home/yourUserName/JBuilder9/jdk1.4/man/man1/java.1 java.1 /home/yourUserName/JBuilder9/jdk1.4/man/man1/java.1
Bye
Axel