Setting Default JDK Problem

[Russ Kinter]

Hi All,
I am relatively new to both Linux and Fedora 5 x84_64 and I can't seem
to get the tools of the Sun JDK working via command line. The
installation of the JDK seemed to go fine.

Typing: [root at localhost ~]# java -version

Produces:
java version "1.5.0_07"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-b03)
Java HotSpot(TM) Client VM (build 1.5.0_07-b03, mixed mode, sharing)

(The Sun JDK package was installed not just the JRE....in theory
anyway :)
 
However typing: [root at localhost ~]# jar -V

produces:
jar (fastjar) 0.92-gcc

Copyright 1999, 2000, 2001  Bryan Burns
Copyright 2006 Free Software Foundation..........

Then typing: [root at localhost ~]# javac

produces:
Eclipse Java Compiler v_585_R31x, 3.1.2 release, Copyright IBM Corp
2000, 2006. All rights reserved.

Typing: [root at localhost ~]# appletviewer
produces:
bash: appletviewer: command not found

As you can see the problem is simply Sun JDK is not the default!
How do I make the Sun JDK the default? Which environment/configuration
file do I modify?

Thanks!
Russ Kinter