The stanton-finley.net is oriented toward users (emphasis on JRE), you're probably equally interested in development (as am I).
Bottom line: there's no problem in having multiple versions, and what you've done sounds correct.
I'd make things even simpler, however:
1. Have a little "setenv" script in each of your project directories, e.g.
2. "source" it with this syntax:
3. Voila! Your command line environment is set for this particular version of Java
4. It's worth noting that most IDEs (including both Netbeans and Eclipse)
let you specify one or another JDK's in their respective "project options".
'Hope that helps .. PSM