Java 25-5 Network Programming Multi-threaded implementation chat room

Usually chat is in the same window, so, this window at the same time to send data and receive data, then need to implement multi-threading.

Create a class:

Put the sending and receiving end of the chat in the same class, start a window

1  Public classCharroom {2 3      Public Static voidMain (string[] args)throwsIOException {4             5             //creating the socket send and receive objects6Datagramsocket send =NewDatagramsocket ();7Datagramsocket receive =NewDatagramsocket (10010);8         9         //2 simultaneous runs with multiple threadsTenSendthread st =Newsendthread (send); OneReceivethread RT =NewReceivethread (receive); A          -Thread Stthread =NewThread (ST); -Thread Rtthread =NewThread (RT); the          -         //Start Thread - Stthread.start (); - Rtthread.start (); +          -          +}

Then set up the Send class:

　　

1  Public classSendthreadImplementsRunnable {2 3     //construct a parameter4     Privatedatagramsocket ds;5 6      PublicSendthread (datagramsocket ds) {7          This, D1 =ds;8     }9 Ten      Public voidrun () { One  A         Try { -  -             //the contents of the keyboard input, data packaging the             //Create keyboard input object, IO stream -BufferedReader br =NewBufferedReader (NewInputStreamReader ( - system.in)); -             //reading the input data +String line =NULL; -              while(line = Br.readline ())! =NULL) { +                 //Set Exit Criteria A                 if(Line.endswith ("886")) { at                      Break; -                 } -  -                 //string converted to byte, packaged -                 byte[] Bys =line.getbytes (); -                 //Send Data inDatagrampacket DP =NewDatagrampacket (bys, Bys.length, -Inetaddress.getbyname ("172.19.xx.xxx"), 10010); to  + Ds.send (DP); -  the             } *                 //Freeing Resources $ ds.close ();Panax Notoginseng  -         } the             //Handling Exceptions +             Catch(IOException e) { A e.printstacktrace (); the             } +     } -}

Receive side: (To start all the time, so there is no need to release resources)

1  Public classReceivethreadImplementsRunnable {2 3     //Construction Method Receive4     Privatedatagramsocket ds;5 6      PublicReceivethread (datagramsocket ds) {7          This, D1 =ds;8     }9 Ten     //Receive Data One      Public voidrun () { A  -         Try { -             //The receiving end has been started the              while(true) { -                 //Create a packet -                 byte[] Bys =New byte[1000]; -Datagrampacket DP =NewDatagrampacket (bys, bys.length); +  -                 //Receiving Packets + Ds.receive (DP); A  at                 //Parsing Packets -String result =NewString (Dp.getdata (), 0, Dp.getlength ()); -                 //gets the machine name of the sending end -String name =dp.getaddress (). GetHostName (); -  -                 //Print to console inSystem.out.println ("from" + Name + "Send:" +result); -             } to         } +         //Handling Exceptions -         Catch(IOException e) { the e.printstacktrace (); *         } $ Panax Notoginseng     } -}

Based on these, build the GUI, plus optimize, you can make a chat room

Java 25-5 Network Programming Multi-threaded implementation chat room