private void sendRequest(BlockPdu pdu) { setButton.setEnabled(false); getButton.setEnabled(false); getNextButton.setEnabled(false); lmessage.setText("Sending request .."); lmessage.setBackground(Color.white); try { varbind var = pdu.getResponseVariableBinding(); AsnObjectId oid = var.getOid(); AsnObject res = var.getValue(); if (res != null) { toid.setText(oid.toString()); tvalue.setText(res.toString()); lmessage.setText("Received aswer "); lmessage.setBackground(Color.white); } else { lmessage.setText("Received no aswer "); lmessage.setBackground(Color.red); } } catch (PduException exc) { lmessage.setText("PduException: " + exc.getMessage()); lmessage.setBackground(Color.red); exc.printStackTrace(); } catch (java.io.IOException exc) { lmessage.setText("IOException: " + exc.getMessage()); lmessage.setBackground(Color.red); exc.printStackTrace(); } setButton.setEnabled(true); getButton.setEnabled(true); getNextButton.setEnabled(true); }