reading from Serial Port (com port 1 to 10)

Dear All,

After thanking all those who are the contributors to this very 
informative and useful Java tool, I would like to ask that if there a 
sample code that can read and write the transaction to the serial port, 
i.e, simply read from a given port and write back to the same port. Has 
this tool been already developed ? I think it would be very useful 
because there are so many things out there (hardware as well), which 
are very able to communicate in serial.

Regards and thanks,
tasbihmr