Throughout this exercise, you must use exclusively the Java 2 platform. You may develop your code using any implementation of the Java 2 platform, but the submission that you return must have been tested and shown to work under a production (not development) version of the Sun Microsystems' Java 2 platform and that platform must not have been superseded by a new production version for more than 18 months by the time you make your submission.
Is it ok if I use JDK6 Update 16 (The latest release) for developing the assignment application?
I think for this assignment no changes are needed when you switch from Java 5 to Java 6, because only a few minor changes are made. If you have to change from Java 1.4 to Java 6 (or 6) you will have a whole lot to do