Hi Yen,
Don't think this is the appropriate forum to ask such a question, because for the
SCJD you have to use jdk 1.5 or jdk 1.6. So the 1.4 is out of the question.
As far as i know there is nothing from Java 1.4 that won't run in java 1.5. The only thing you have to watch out for (and i can think of) is this code:
because the enum is a java keyword since java 1.5
Kind regards,
Roel