Send Data from Mobilephone to PC through Serial Port

How to send the data to the pc through serial port?
Thanks.

Does that has something to do with Java??

Yes it have.
I'm developing an application for a Java enabled mobile phone.
I can already send data through Bluetooth but it must be able to send through Com Port/USB cable.

Well, I don't think this is the right forum for your question. You might try Sun forums