We would recommend SerialPort for anyone wishing to add serial port connectivity to a Java application 

Fanfare provides the only software solutions to help high-tech equipment vendors and service providers simplify and accelerate system and device testing. As part of our solution, we provide our customers the ability to test their devices connected through a serial port connection. After researching various third-party solutions, we selected SerialIO.com's SerialPort product as we found it to be the best tool for working with serial port connections in a Java application. We would recommend SerialPort for anyone wishing to add serial port connectivity to a Java application 

Ameya Barve Manager Software Engineering - The Fanfare Group, Inc.