Hi Eiji,
I think this question should enter the FAQ.
We
do have a question (and answer) for "
How can I find out when a version of the JDK was released?", from which someone could calculate that you have until March 29th to submit code that has only been compiled and tested using JDK 1.4. After March 29th you would, of course have to compile and
test using at least JDK 1.5.
The advantage of this particular question and answer is that it still works when JDK 1.6 or 1.7 ... is released.
But if you would like to write something up in the FAQ, then go for it - the FAQ is in a WIKI, so anyone can modify it to add questions and answers
Regards, Andrew