The java adapter will adapt java games or applications for another mobiles for your Motorola ROKR E2. The software is made by UncleRus and modified for usage with E2 by Lubomyr
Usage: For example if you are adapting a game from Nokia and it's name is game.jar you should use:
> adapter --i game.jar --o game_E2.jar --k nokia --s 240x320
Read the readme.html for more details.