I created a BlackBerry application using java-me and the BlackBerry specific API. It works fine on the BlackBerry simulator.
I want to know how I can deploy this applica
Yes to deploy your code in device you need a signing key. That will enable your code to run on device. This signing key is almost free. You have to install it in your machine and than sign your .cod file with that signing key. As you have told you have your app ready and working in simulator, here are the steps to sign and deploy this app in device.
Buy a signing key for Blackberry java development from here
Install this in your machine, you will find some help from here
Now you have your code ready to sign, just clean and build from your IDE (eclipse or JDE)
Run the signature tool, you can see which cod files need to be signed and which are optional, sign all cod files. You are prompted to insert a password.
Now you have the application ready to install in device, either by cable or by OTA
For cable install, get the .cod and .alx file in same folder and point your javaloader or your BB Desktop manager to this folder.
For OTA follow these steps
a. Get a .cod file and open it with any archive manager. You can see multiple cod siblings in it.
b. Extract the siblings in some folder.
c. Copy jad file of your project in same folder where your cod files are there.
d. Point your browser to that jad file and app will be installed.