Java completely non-functional?

[Vincent Santamauro <vincent aeps com>]

Hello,

I'm running a fresh installation of RedHat 7.3, and it seems no 
Java-based application will run.  Netscape 6's XUL-based panels all come 
up blank, no applets will run, and I cannot run any JAR files because my 
shell can't find a java executable.  Not only have I installed the Java 
that came with Netscape, I also installed Sun's Java2 JRE 1.4 
independently, and nothing works.  Any ideas?

TIA,
Vincent