hi,
I have written some Midlet Suite which will connect 'google 'using HttpConnection.If i run this using Emulated J2Me Midlet,its not giving any error.Then I have created a package,it has given me .jar and .jad file if i tried to install to Blackberry 8320 device its showing "its an untrusted or not a signed application to install do you want to continue?".
If i say yes and try to access application its giving java.lang.NullPointerException.help me how to proceed...

You might want to try the developer subforum.

java.lang.NullPointerException errors usually refer to a corrupt database. hope that helps you point in the right direction. definately check out the developer section. Also when you have it perfected, check out appworld and submit it to blackberry
BlackBerry - BlackBerry App World Submission Process