Setting Java plugin for Firefox

If you have JDK or JRE installed, enabling java in Firefox is easy.
Just make a symbolic link of libjavaplugin_oji.so resided in your JRE to your Firefox-Plugin directory.

In short ,
ln -s $JAVA_HOME/jre/plugin/i386/ns7-gcc29/libjavaplugin_oji.so /usr/lib/firefox-2.0.0.3/plugins/

will enable java in your Firefox.