"production (not development) version of the Sun Microsystems' Java 2 platform"

I was recently laid off, and I'm preparing to develop my solution at home. I was going to use jdk1.3 (and use its rmiregistry). A former colleague of mine (not laid off) said, on my last day at work, that he'd be willing to QA my solution on a Solaris box at work (presumably also with the jdk).
So, what qualifies as a "production ... version" of the Java 2 platform, do I need to get myself one for my development at home, and, if so, then which "production ... version" should I get? Also, will I need to ensure that that colleague of mine will have access to such a "version"?
------------------

Hey,
You need to be 1.2 and above. Not sure how far up "production level" goes, but someone on here said that 1.3 is considered production as of last fall sometime. I use jdk1.2.2, jdk1.3, and jdk1.3.0_01 and see no differences between them and I feel reasonably sure all are within the scope of "production version"
With Respect,
Matt DeLacey

On sun's site they have marked some versions as production releases like this:
"J2SE: Java 2 Standard Edition (SDK 1.3.0_02) Production Release for the Solaris[tm] Operating Environment"
See these URLs: http://www.sun.com/software/solaris/java/download.html http://www.javasoft.com/products/jdk/1.2/
"For further comparison between the Solaris Production Release and Reference Implementation, see the Java Technology FAQ." http://www.javasoft.com/products/jdk/faq.html#A3

I developed and submitted my assignment with JDK 1.3. I passed with a score of 93%, so it is definitely acceptable to use JDK 1.3.