UDP Multicast Java

1. Service Side

 Public classUdpmulticastserver {/**     * @paramargs*/     Public Static voidMain (string[] args) {//TODO auto-generated Method Stub//The datagram service, which accepts multicast and sends multicast, adds the multicast address.String host = "225.0.0.1";//Multicast address        intPort = 9998; intLength = 1024; byte[] buf =New byte[length]; MulticastSocket Ms=NULL; Datagrampacket DP=NULL; Try{ms=NewMulticastSocket (port); DP=Newdatagrampacket (buf, length); //join A multicast addressInetAddress Group =Inetaddress.getbyname (host);            Ms.joingroup (group); System.out.println ("Listen for multicast port open:");  while(true) {ms.receive (DP); inti; StringBuffer Sbuf=NewStringBuffer ();  for(i = 0; i < 1024x768; i++) {                    if(Buf[i] = = 0) {                         Break; } sbuf.append ((Char) buf[i]); } System.out.println ("Received multicast message:" +sbuf.tostring ()); Try{Thread.Sleep (1000); }                Catch(interruptedexception e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }        }        Catch(IOException e) {e.printstacktrace (); }    }}

2, the Client

 Public classudpmulticastclient {/**     * @paramargs*/     Public Static voidMain (string[] args) {//TODO auto-generated Method StubString host = "225.0.0.1";//Multicast address        intPort = 9998; String message= "Test-multicastsocket"; Try{inetaddress Group=Inetaddress.getbyname (host); MulticastSocket s=NewMulticastSocket (); //join a multicast groupS.joingroup (group); Datagrampacket DP=NewDatagrampacket (Message.getbytes (), Message.length (), group, port);  while(true) {S.send (DP); Try{Thread.Sleep (1000); }                Catch(interruptedexception e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }        }        Catch(unknownhostexception e) {e.printstacktrace (); }        Catch(IOException e) {e.printstacktrace (); }    }}

UDP Multicast Java