AnuRanjan,
There are multiple ways to send data to APM. One of the most common is to use the EPAgent as your communication host and then develop plug-ins into the epagent. The other ways is to open a RESTful or socket connection directly to APM and send the XML metric form through.
Which method are you trying to do?
If you are using the Epagent plugin method, could you provide the IntroscopeEPAgent.properties file to insure that you have the Java plugin configured?
If you are using the Restful or socket methods, could you provide the additional Java code to open a socket connection to the Enterprise Manager/Collector and the code that writes the metric XML to the connection?
Hopefully this is helpful,
Billy