Warning before follow this tutorial you must understand that only few .jar will work on a blackberry (J2ME), because there are not designed to be used on a blackberry.
1- So first step download JDE
http://na.blackberry.com/eng/developers/downloads/jde.jsp
and install it
I use JDE 4.2.1 but 4.3 should wrok too
Install JDK from java
http://java.sun.com/javase/downloads/index.jsp
After go in the directory
C:\Program Files\Research In Motion\BlackBerry JDE 4.2.1\bin
(If you installed it on C:/)
put your .jar here
2- Download JAD maker or another program to create a .jad from .jar
http://innostream.p10.free.fr/public/logiciel/JADMaker.zip
install it (I have installed it in C:\Program Files\Research In Motion\BlackBerry JDE 4.2.1\bin)
3-open jadmaker and drag and drop your .jar file on jadmaker window.
You should have created a .jad in the same directory
4-use rapc to create .cod file
C:\Program Files\Research In Motion\BlackBerry JDE 4.2.1\bin>rapc.exe import="C:
\Program Files\Research In Motion\BlackBerry JDE 4.2.1\lib\net_rim_api.jar" code
name="Platinium" -midlet jad="platinium.jad" platinium.jar
remplace platinium by your application name of course :)
if your application is ok, you should have game.cod in /bin directory
5- upload your .cod on your black berry using javaloader
(Plug your blackberry on your PC)
C:\Program Files\Research In Motion\BlackBerry JDE 4.2.1\bin>javaloader -usb load platinium.cod
Normally at this step you should have the application on your blackberry, so click on his icon to launch it and see if it's work !
6- To delete the application use javaloader again
javaloader -usb erase platinium.cod
I know, it's long to do this and many applications doesn't work but it's the only way.