Ho trovato questo:

public class EthZeroMacAddress {
public EthZeroMacAddress() {
}
static {
System.loadLibrary("getmac");
}
public native String getMacAddress();
public static void main(String[] args) {
EthZeroMacAddress eth0 = new EthZeroMacAddress();
System.out.println("ETH0 MAC ADDRESS=" + eth0.getMacAddress());
}
}

Qualcuno sa aiutarmi ad usare questa classe?