Windows java project to unix

I currently have a program running on windows java 1.4.2. The program needs to be but on an ibm aix unix box running java 1.3.1.
My question:
Can I compile the project with windows java 1.3.1 and then move the compiled classes over to the aix unix box that is running java 1.3.1?
Will there be any issues or problems in doing this or will it work fine? Reason asking is I hate using the unix compiler and editor and prefer the windows environment.

Java is a platform independent language ("write once,
run anywhere")Of course, I have heard that modified to "write once, debug everywhere". My own experience is that problems are rare.
RD-R
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