Make Java work. How?

[Herman]

I need to install JAVA.
Do I?
Synaptic tells me that many Java packages are installed.

If I have a webpage that needs Java, it wants to install Java.
 (the plug-in tries to install JRE, Java Runtime Environment)

I use Ubunti 6.06, default installation.


I tried it out on this website: (and it does not work)
Java Morse Code Translator
http://morsecode.scphillips.com/jtranslator.html

How do I get Java to work for me?

Herman in PHL.
-- 
Using Linux-Ubuntu. No more Windows.