Download:
j2sdk-1_4_2_04-nb-3_6-bin-linux.bin with NetBeans from
java.sun.com. It is a very large file, but after installation you can delete it and also delete Netbeans which it will also want to install in /opt. It's just easier to install this than the others.
'cd' to the directory where you downloaded it, and as root do:
chmod 777 j2sdk-1_4_2_04-nb-3_6-bin-linux.bin
then:
./j2sdk-1_4_2_04-nb-3_6-bin-linux.bin
The installer will come up. Follow the directions. Let the installer install it to:
/opt/j2sdk-1_4_2_04
After installation is complete, we now need to make the symbolic link. Open konsole and become root, then copy and paste this:
ln -s /opt/j2sdk1.4.2_04/jre/plugin/i386/ns610-gcc32/libjavaplugin_oji.so /home/
Whiskers/.mozilla/plugins/libjavaplugin_oji.so
...into konsole and press enter. That *should* create the symlink to make java plugins work with your mozilla browser, which will also make it work with Firefox. It does in Fedora, but we may have to do some tailoring as I've not tried it with Mdk 10.
Of course, change what I've underlined above to the actual name of your home directory. Good luck!