Network Programming-UDP Program Chat applet

1  PackageCom.yyq;2 3 ImportJava.io.BufferedReader;4 ImportJava.io.InputStream;5 ImportJava.io.InputStreamReader;6 ImportJava.net.DatagramPacket;7 ImportJava.net.DatagramSocket;8 Importjava.net.InetAddress;9 Importjava.net.SocketException;Ten  One /* A * Write a chat program. There is part of the data, there is the part that sends the data, these two parts need to execute simultaneously - * Then you need to use multithreaded technology. A thread is Cheng, a line is closed.  - * Because the receiving and sending action is inconsistent, so the  */ - classSendImplementsrunnable{ -     Privatedatagramsocket ds; -      PublicSend (datagramsocket ds) { +          This. ds =ds; -     } +      Public voidrun () { A         Try{ atBufferedReader BUFR =NewBufferedReader (NewInputStreamReader (system.in)); -String line =NULL; -              while(line = Bufr.readline ())! =NULL){ -                 if("88". Equals (line)) { -                      Break; -                 } in                 Else{ -                     byte[] buf =New byte[1024]; toDatagrampacket DP =NewDatagrampacket (Buf,buf.length,inetaddress.getlocalhost (), 1237); + Ds.send (DP); -                 } the             } *         } $         Catch(Exception e) {Panax Notoginseng             Throw NewRuntimeException ("Send Side failed!! "); -         } the     } + } A classReceImplementsrunnable{ the     Privatedatagramsocket ds; +      Publicrece (datagramsocket ds) { -          This. ds =ds; $     } $      Public voidrun () { -         Try{ -              while(true){ the                 byte[] buf =New byte[1024]; -Datagrampacket DP =NewDatagrampacket (buf,buf.length);Wuyi Ds.receive (DP); theString IP =dp.getaddress (). gethostaddress (); -String data =NewString (Dp.getdata (), 0, Dp.getlength ()); WuSystem.out.println (ip+data); -             } About         } $         Catch(Exception e) { -             Throw NewRuntimeException ("The Receiving end fails!! "); -         } -     } A } +  Public classChatdemo { the      Public Static voidMain (string[] args)throwsSocketException { -Datagramsocket Sendsocket =NewDatagramsocket (); $Datagramsocket Recesocket =NewDatagramsocket (1237); the         NewThread (Newrece (Sendsocket)). Start (); the         NewThread (NewSend (Sendsocket)). Start (); the     } the}

Network Programming-UDP Program Chat applet