title: RxTx installation on windows java.lang.NoClassDefFoundError: gnu/io/CommPort
body: <p>I put <code>rxtxcomm.jar</code> into <code>jre/lib/ext</code> folder, but I still get <code>NoClassDefFoundError</code> Isn't this folder automatically taken into the global classpath?</p>
  
  <p>Thanks</p>