java - jNetPcap acknowledgement value -

im trying retrieve ack tcp 1 wireshark returns. in wireshark returns ack of 1 or 647. when i'm trying ack packet returns long number nothing similar ack wireshark returns.

i these acks:

1918004163 3350411129 3083820792 1730247758 3668869711 4218577993

this code:

 if (packet.hasheader(tcp) && packet.hasheader(ip)) {                         long tcpack = packet.getheader(tcp).ack();                          string name = packet.getheader(tcp).getname();                         int urgent = packet.getheader(tcp).urgent();                         int windowscaled = packet.getheader(tcp).windowscaled();                         int window = packet.getheader(tcp).window();                         int wirelen = packet.getcaptureheader().wirelen();                         // system.out.println("wirelen: "+wirelen);                         int caplen = packet.getcaptureheader().caplen();                         // system.out.println("caplen: "+caplen);                         string iptypestring = ip.typeenum().tostring();                         // system.out.println("ip type: "+iptypestring);                         string ipdescription = ip.getdescription();                         // system.out.println("ip description: "+ipdescription);                         byte[] dip = packet.getheader(ip).destination();                         byte[] sip = packet.getheader(ip).source();                         string sourceip = formatutils.ip(sip);                         // system.out.println("source ip: "+sourceip);                         string destinationip = formatutils.ip(dip);                         // system.out.println("destination ip: "+destinationip);                         int tcpportsource = tcp.source();                         // system.out.println("tcp port source:                         // "+tcpportsource);                         int tcpportdestination = tcp.destination();                         // system.out.println("tcp port destination:                         // "+tcpportdestination);                         if (sourceip.equals("someip") && tcpportsource == 0000 && iptypestring.equals("tcp")                                 && wirelen == 1514) { //                          system.out.println("tcp ack: "+tcpack+" name: "+name+ " urgent: "+urgent + " window scaled: "+windowscaled+ " window: "+window);                         } 

how retrieve same ack value wireshark?

you can't. numbers seeing in wireshark in no. column, right? assigned wireshark , not info available in packets.