jre not found?

[Tyler <tyler.smith@mail.mcgill.ca>]

Hi,

I don't know anything about java, but I have to use a java app for some 
research. I've installed everything I can find in the repos for 
sun-java5, listed below. I also have some of the free alternatives 
installed. I have no real preference, other than I need something that 
works. At the moment, when I try and invoke the application (arlequin, 
for molecular analysis) I get the following error:

jre: command not found

Is there something I still have to install, or am I missing a 
configuration step? My usual first approach, to install stuff until it 
works, has failed me, as has google.

Thanks,

Tyler

java stuff I've installed:

sun-java5-jre
sun-java5-bin
sun-java5-plugin
sun-java5-fonts
sun-java5-demo
sun-java5-jdk
sun-java5-source
sun-java5-doc

fastjar
gij-4.