$javac -classpath RXTXcomm.jar:. SerialTest.java

SerialTest.java:3: cannot find symbol
symbol  : class CommPortIdentifier
location: package gnu.io
import gnu.io.CommPortIdentifier;
             ^
SerialTest.java:4: cannot find symbol
symbol  : class SerialPort
location: package gnu.io
import gnu.io.SerialPort;
             ^
SerialTest.java:5: cannot find symbol
symbol  : class SerialPortEvent
location: package gnu.io
import gnu.io.SerialPortEvent;
             ^
SerialTest.java:6: cannot find symbol
symbol  : class SerialPortEventListener
location: package gnu.io
import gnu.io.SerialPortEventListener;
             ^
SerialTest.java:9: cannot find symbol
symbol: class SerialPortEventListener
public class SerialTest implements SerialPortEventListener {
                                   ^
SerialTest.java:10: cannot find symbol
symbol  : class SerialPort
location: class SerialTest
    SerialPort serialPort;
    ^
SerialTest.java:83: cannot find symbol
symbol  : class SerialPortEvent
location: class SerialTest
    public synchronized void serialEvent(SerialPortEvent oEvent) {
                                         ^
SerialTest.java:27: cannot find symbol
symbol  : class CommPortIdentifier
location: class SerialTest
        CommPortIdentifier portId = null;
        ^
SerialTest.java:28: cannot find symbol
symbol  : variable CommPortIdentifier
location: class SerialTest
        Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();
                               ^
SerialTest.java:32: cannot find symbol
symbol  : class CommPortIdentifier
location: class SerialTest
            CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
            ^
SerialTest.java:32: cannot find symbol
symbol  : class CommPortIdentifier
location: class SerialTest
            CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
                                             ^
SerialTest.java:48: cannot find symbol
symbol  : class SerialPort
location: class SerialTest
            serialPort = (SerialPort) portId.open(this.getClass().getName(),
                          ^
SerialTest.java:53: cannot find symbol
symbol  : variable SerialPort
location: class SerialTest
                    SerialPort.DATABITS_8,
                    ^
SerialTest.java:54: cannot find symbol
symbol  : variable SerialPort
location: class SerialTest
                    SerialPort.STOPBITS_1,
                    ^
SerialTest.java:55: cannot find symbol
symbol  : variable SerialPort
location: class SerialTest
                    SerialPort.PARITY_NONE);
                    ^
SerialTest.java:84: cannot find symbol
symbol  : variable SerialPortEvent
location: class SerialTest
        if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
                                     ^
16 errors
MacBook-Pro:src user$ ls
RXTXcomm.jar        comm.jar        librxtxSerial.jnilib
SerialTest.java     librxtxParallel.so  librxtxSerial.so
MacBook-Pro:src user$

java -Djava.library.path=".:/Users/bill/rxtx/jni" MyClass