Friday, August 3, 2007 04:51 AM
First let me say that I've only used serial ports with Java once and I didn't get into low level details AT ALL. But since nobody else is answering I'll give what little info I have...
About all I can tell you is that we had success using external serial modems using SerialPort software from SerialIO. This is Java that gives you finer control over serial ports via JNI.
I don't think Java alone can be very good at serial port access - that's too low-level.