rxtx 2.1.6

[bimbo]

Hello all,
I have problem with rxtx 2.1.6....no commApi comm.jar




import gnu.io.*;

public class porty
{
public static void main(String[] args)
{
CommPortIdentifier.getPortIdentifiers();
}
}

$/usr/lib/java/bin/javac porty.java
$/usr/lib/java/bin/java porty

java.lang.NoClassDefFoundError: javax/comm/CommDriver thrown while
loading gnu.io.RXTXCommDriver

this message is return
can anybody help me what I have bad??

Thank very much

Pavel