xbee OEM RF Modules java programming?

i wanted to develop my own java application to load on my XBee pro modules, but i did not know how to do so. does any one know how to do such a thing?
i have searched a lot, and found out that Xbee ZB pro modules can be programmed using Code Warrior, and the code can be loaded using “Xmodem” menu which i do not have in my X-CTU!!

help plz

any one?
help plz