Snmp snmp;
        try {
            TransportMapping transport = new DefaultUdpTransportMapping();
            snmp = new Snmp(transport);    //udp 传输协议            transport.listen();
            System.out.println(transport.isListening()+"  isListening!!!!!!!");            CommunityTarget target = new CommunityTarget();  //agent对象
            target.setCommunity(new OctetString(community));  //设置共同体名
            target.setAddress(targetAddress);
            target.setRetries(Set_OtherInfo.Set_Data_isetRetries);//设置重试次数
            target.setTimeout(Set_OtherInfo.Set_Data_isetTimeout);//设置超时
            target.setVersion(Set_OtherInfo.Set_Data_iversion);//版本            PDU pdu = new PDU();//new request PDU包
            pdu.add(new VariableBinding(new OID(strOID), new Integer32(Value))); //OID添加
            pdu.setType(Set_OtherInfo.Set_Data_iType); //设置PDU类型            ResponseListener listener = new ResponseListener() {
                public void onResponse(ResponseEvent event) {
                    // Always cancel async request when response has been received
                    // otherwise a memory leak is created! Not canceling a request
                    // immediately can be useful when sending a request to a broadcast
                    // address.
                    ((Snmp) event.getSource()).cancel(event.getRequest(), this);
                    System.out.println("Set Status is:" + event.getResponse());
                }
            };
            snmp.send(pdu, target, null, listener);        } catch (Exception e) {
            Log4jTest.log4j_init().info(e.getMessage());
            e.printStackTrace();
        }
红色的那句话是什么意思 啊