I'll give you a little help first in structuring your questionable approach above:
A. Be ever specific:
- Exact Java Version (e.g. ME 1.6)
- Which RFID reader (Product name and version)
- Connection cable type
- Show your sample code and tell us your issues with it
B. Be ever polite:
- Don't be demanding
- Use some niceness like "Thanks in advance!" or "Thank you!"
Thanks for reading this. Please be so kind and edit your question ("Improve question" link) to supply us with the missing information.
Best Regards,
Manfred