Which Java to use?

[Jim Hall <volunteer@revealed.net>]

I need to install a Java Runtime Environment (now, for Firefox) on my 
churchs computer lab systems (all Sarge). I installed Flash by using the 
"flashplugin-nonfree" pkg. I've found something similar for installing a 
JRE: "java-package". It works with the Standard Edition of the 
following: Sun 1.4 & 1.5; IBM 1.3 & 1.4; Blackdown 1.3 & 1.4. Ideally, I 
won't have to upgrade it for a fairly long time. These are not cutting 
edge systems. First priority is rock solid.

Does anyone have any recommendations for which JRE I should use in a 
"set it and forget it" environment?

Jim