java - UDP client/server chat -


i planning make java chat messenger. facing problem. client side cannot send message until receives message server side program. how fix this?

i have different code server side , client side. client side program.

  datagrampacket send_packet = new datagrampacket(send_data,                                                   send_data.length,                                                    ipaddress, 5020);   client_socket.send(send_packet);   datagrampacket dpacket = new datagrampacket(recv_data, recv_data.length);   client_socket.receive(dpacket);   string msg = new string(dpacket.getdata(),0,dpacket.getlength());   system.out.println("aman2: \n" + msg);


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