How to install J2SE Runtime Environment (JRE) v6.0 with Plug-in for Mozilla Firefox

To Install :-   

     sudo aptitude install sun-java6-jre sun-java6-plugin sun-java6-fonts

• When asked, agree with DLJ license terms.

This doesn't work for amd64, since there's no 64-bit firefox plugin. A 32-bit firefox is necessary. Ubuntuforums provides special scripts for configuring some 32-bit applications in amd64.k

An alternative for amd64 is to use blackdown Java. However it is buggy and not all Java applications work. It is also a closed source application so no benefit can be derived from using it. It is the default Java application for distributions like Gentoo however.

    sudo aptitude install j2re1.4-mozilla-plugin

This installs blackdown Java.