UDP protocol interaction information for Java

Because to do the application of the UDP protocol interaction, so it is specifically learning the next, in fact, similar to the Java server and socket, the following is written a simple demo

Service side:

Package Com.test1;import java.io.ioexception;import java.net.datagrampacket;import java.net.DatagramSocket; Import Java.net.inetsocketaddress;import java.net.SocketException; Public classUpdserver {Private byte[] Buff =New byte[1024x768]; PrivateDatagrampacket DP; PrivateDatagramsocket ds; Privateinetsocketaddress socketaddress;  PublicUpdserver (String host,intPort) {socketaddress=Newinetsocketaddress (host, Port); Try{DS=NewDatagramsocket (socketaddress); } Catch(SocketException e) {System. out. println ("Connection failed:"+e.getlocalizedmessage ());        E.printstacktrace (); } System. out. println ("The server opens the monitor ..."); }        PrivateString receive (String host,intPort) {String Info=""; Try{DP=NewDatagrampacket (Buff,0, buff.length);            Ds.receive (DP); Info=NewString (Dp.getdata (),0, Dp.getlength ()); }Catch(Exception e) {e.printstacktrace (); }        returninfo; }         Public Static voidMain (string[] args) {String host="127.0.0.1"; intPort =8888; Updserver Server=NewUpdserver (host, Port); String Info=server.receive (host, Port); System. out. println (info); //send information to the customer service sideServer.send (NewString ("Hello, Sao year! ")); }    Private voidSend (Stringstring) {datagrampacket DPS=NewDatagrampacket (Buff,0, Buff.length, Dp.getaddress (), Dp.getport ()); Dps.setdata (string. GetBytes ()); Try{ds.send (DPS); } Catch(IOException e) {e.printstacktrace (); }    }}

Client:

Package Com.test1;import java.io.ioexception;import java.net.datagrampacket;import java.net.DatagramSocket; Import Java.net.inetaddress;import java.net.SocketException; Public classupdclient {Private byte[] Buff =New byte[1024x768]; PrivateDatagrampacket DP; PrivateDatagramsocket ds;  Publicupdclient () {Try{DS=NewDatagramsocket (); } Catch(SocketException e) {e.printstacktrace (); }    }         Public Static voidMain (string[] args) {updclient updclient=Newupdclient (); String Host="127.0.0.1"; intPort =8888; Updclient.send (host, Port,NewString ("Hello, Junior!"). GetBytes ()); //AcceptString info =updclient.receive (); System. out. println (info); }    PrivateString receive () {Datagrampacket DPR=Newdatagrampacket (Buff, buff.length); String Info=""; Try{ds.receive (DPR); Info=NewString (Dpr.getdata (),0, Dpr.getlength ()); } Catch(IOException e) {e.printstacktrace (); }        returninfo; }    Private voidSend (String host,intPortbyte[] b) {Try{DP=NewDatagrampacket (Buff,0, Buff.length, Inetaddress.getbyname (host), Port);            Dp.setdata (b);        Ds.send (DP); }Catch(Exception e) {e.printstacktrace (); }    }}

UDP protocol interaction information for Java