Installing java applications on your Nokia 6230i is not really difficult. But it is not as easy as copying the application files (usually a jar- and a jad-file) to the phone. You need to install them correctly to be able to use the application .
A convenient way is to use the programm
gammu. First you need to set up a
configuration file to let gammu communicate with your phone over bluetooth. This
file should look similar to the following:
[gammu] Model=6310i Device= Connection=bluephonet SyncTime=no LockDevice=yes StartInfo=no
Now you can try to connect to your phone by calling
gammu --identify. If this
is successful, you can proceed by instructing gammu to install an application:
gammu --nokiaaddfile Application
The name of the application is the name of the jar- or jad-file without its extension. If you replace the term "Application" with "Game", you can install the application to the games-folder instead of the default application folder.
Bernd Wurst describes on his website under Kurztipp: Schnellere Bluetooth-Verbindung mit gammu how to change the gammu configuration file to speed up time gammu needs to connect to your phone.