Everyone I am new in XMPP development. Actually I am developing OpenFire mobile clint in J2me. I download smack3.1.0 java source code. but it develop in core java, so i am not able to use directly in j2me because j2me do not support the complete core java like example in smack it uses Collection class it not found in j2me. then how to use this library. Please suggest me it is urgently.