You must
TEST on a new Java 2 platform (not superseded etc).
You can DEVELOP on any J2SE version.
How do I know for sure???
I passed my SCJD last month and I did it on 1.4
(All I had to do was verify that the jar works with java 6, but I compiled the jar on 1.4)...

[ April 26, 2007: Message edited by: Brian Kelly ]