java.lang.UnsatisfiedLinkError with iCommand

[paulreiners]

When running the following code:

Code: Select all

import lejos.nxt.Sound;
import icommand.nxt.comm.NXTCommand;

public class Beep {

   public static void main(String[] args) {
      NXTCommand.open();
      Sound.beep();
      System.out.println("Done playing tone.");

      NXTCommand.close();
   }
}


I'm getting the following error:

Properties location: C:\Documents and Settings\Administrator\icommand.properties
BlueCove version 2.0.0 on winsock
Exception in thread "main" java.lang.UnsatisfiedLinkError: playTone
at lejos.nxt.Sound.playTone(Native Method)
at lejos.nxt.Sound.systemSound(Sound.java:34)
at lejos.nxt.Sound.beep(Sound.java:71)
at Beep.main(Beep.java:19)
BlueCove stack shutdown completed

I believe my path is set correctly:

NXJ_HOME=C:\javaTools\lejos_NXJ_0_4_0beta\lejos_nxj
Path=C:\javaTools\lejos_NXJ_0_4_0beta\lejos_nxj\bin;[...]

What am I doing wrong here?

[bbagnall]

Hi Paul,

Your code tries to use leJOS NXJ classes and then compile using iCommand (see your first line that imports a lejos class). The correct code should be:

Code: Select all

import icommand.nxt.Sound;
import icommand.nxt.comm.NXTCommand;

public class Beep {

   public static void main(String[] args) {
      NXTCommand.open();
      Sound.playTone(1000, 1000);
      System.out.println("Done playing tone.");

      NXTCommand.close();
   }
}


Note, the iCommand API doesn't have methods for beep(), etc... I'll try to add these for the next release so that it more closely shadows the leJOS NXJ API.