Communication wit Microcontroler

[ivannavi]

I had add library from RXTX (

http://users.frii.com/jarvi/rxtx/)

package and have copied code from page :
TwoWaySerialComm (

http://rxtx.qbang.org/wiki/index.php/Two_way_communcation_with_the_serial_port)

for communication and tested it with Command prompt-u.
and PIC microcontroller.



I have built JFrame with JTextField, where I would like to see arrived sign and send typed key.

Problem:
What is the variable I haw to get (from RXRX code) to see the value in new JTextField from MCU and what method I need to use?
Thank you