private void sendGetRequest() { try { pdu = new BlockPdu(context); pdu.setPduType(BlockPdu.GET); pdu.addOid(ifNumber); AsnObject res = pdu.getResponseVariable(); if (res != null) { int ifCount = ((AsnInteger) res).getValue(); System.out.println("ifCount " + ifCount); pdu = new BlockPdu(context); pdu.setPduType(BlockPdu.GETNEXT); for (int no = 0; no < ifCount; no++) { for (int i = 1; i <= noIfEntry; i++) { String oid = ifEntry + "." + i + "." + no; pdu.addOid(oid); } } sendRequest(pdu); } else { System.out.println("Received no answer"); } } catch (Exception exc) { exc.printStackTrace(); } }