String portName = "COM1";
if (args.length > 0) portName = args[0];
PhoneListener pl = new PhoneListener();
try {
CommPortIdentifier cpi = CommPortIdentifier.getPortIdentifier(portName);
if (cpi.getPortType() == CommPortIdentifier.PORT_SERIAL) {
SerialPort modem = (SerialPort) cpi.open("Phone Listener", 1000);
modem.notifyOnRingIndicator(true);
modem.addEventListener(pl);
}
}
catch (NoSuchPortException e) {
System.err.println("Usage: java PhoneListener port_name");
}
catch (TooManyListenersException e) {
// shouldn't happen in this example
}
catch (PortInUseException e) {
System.err.println(e);
}