I installed KUbuntu “Breezy Badger” on my new Laptop (Dell Inspiron 700m) but none of my java based tools seemed to be working.

The errors I was getting were as follows:

** ERROR **: file ../../../src/libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkImage.c: line 572 (createRawData): assertion failed: (data_fid != 0)

aborting…

The trick is to use the Sun JVM and not the gcj (GNU Java Compiler). Apparently in Debian threads (on which KUbuntu is based) has this error in gcj-4.0. They promise that it will be fixed in version gcj-4.1 (which comes with gcc-4.1).

So follow these steps to get burp / paros etc working:
1. Goto java.sun.com and install the latest jvm for linux. Choose an appropriate location, mine was installed on /opt/jdk1.5.0_06/.
2. rm /usr/bin/java /usr/bin/javac /usr/bin/javah. (you remove symbolic links in /usr/bin which point the version of java to /etc/alternatives).
3. Create new symbolic links

# cd /usr/bin
# ln -s /opt/jdk1.5.0_06/bin/javac javac
# ln -s /opt/jdk1.5.0_06/bin/javah javah
# ln -s /opt/jdk1.5.0_06/bin/java java

Now you should be good to go!

-Rajat.