Which is the best serial port library that can be used on Linux

I want to know the best library to use for serial port communication in Java. I have tried rxtx 1.4 which uses comm.jar, but I ran into some issues. When I test the installation using SampleDemo the port is opened but when I type characters to be sent through the port it is not writing to the port, leading to the result that I do not get any response back.

Is there any way to check if the writing is hap开发者_如何学Gopening or not? I think there is some problem with the library so suggest me some nice ideas to get over it!!