Multithreaded Java Socket Programming example

Package Org.merit.test.socket;import Java.io.bufferedreader;import java.io.ioexception;import Java.io.inputstream;import Java.io.inputstreamreader;import Java.io.outputstream;import Java.io.PrintWriter; Import Java.net.Socket; Public classHandler implements runnable{Privatesocket socket;  PublicHandler (socket socket) { This. socket=socket; }    Privateprintwriter getwriter (socket socket) throws ioexception{OutputStream socketout=Socket.getoutputstream (); return NewPrintWriter (Socketout,true); }    PrivateBufferedReader Getreader (socket socket) throws ioexception{InputStream Socketin=Socket.getinputstream (); return NewBufferedReader (NewInputStreamReader (Socketin)); }     Publicstring Echo (String msg) {return "Echo:"+msg; }     Public voidrun () {Try{System. out. println ("New Connection Accepted"+socket.getinetaddress () +":"+Socket.getport ()); BufferedReader BR=Getreader (socket); PrintWriter PW=getwriter (socket); String msg=NULL;  while((Msg=br.readline ())! =NULL) {System. out. println (msg);                Pw.println (Echo (msg)); if(Msg.equals ("Bye"))                     Break; }        } Catch(IOException e) {e.printstacktrace (); }finally{            Try {                if(socket!=NULL) Socket.close (); } Catch(IOException e) {e.printstacktrace (); }        }    }}

Package Org.merit.test.socket;import Java.io.bufferedreader;import java.io.ioexception;import Java.io.inputstreamreader;import Java.io.outputstream;import Java.net.socket;import Java.util.concurrent.executorservice;import java.util.concurrent.Executors; Public classmultithreadclient { Public Static voidMain (string[] args) {intNumtasks =Ten; Executorservice exec=Executors.newcachedthreadpool ();  for(inti =0; i < numtasks; i++) {Exec.execute (CreateTask (i)); }    }    //define a simple task    Private StaticRunnable CreateTask (finalintTaskID) {        return NewRunnable () {PrivateSocket socket =NULL; Private intport=8821;  Public voidrun () {System. out. println ("Task"+ TaskID +": Start"); Try{Socket=NewSocket ("localhost", Port); //Send Close CommandOutputStream socketout =Socket.getoutputstream (); Socketout.write ("shutdown\r\n". GetBytes ()); //feedback from the receiving serverBufferedReader br =NewBufferedReader (NewInputStreamReader (Socket.getinputstream ())); String msg=NULL;  while(msg = Br.readline ())! =NULL) System. out. println (msg); } Catch(IOException e) {e.printstacktrace ();    }            }        }; }}

Package Org.merit.test.socket;import java.io.ioexception;import java.net.serversocket;import java.net.Socket; Import Java.util.concurrent.executorservice;import java.util.concurrent.Executors; Public classMultithreadserver {Private intPort =8821; PrivateServerSocket ServerSocket; PrivateExecutorservice Executorservice;//thread Pool    PrivateFinalintPool_size =Ten;//single CPU thread pool size     PublicMultithreadserver () throws IOException {ServerSocket=NewServerSocket (port); //the runtime's Availableprocessor () method returns the number of CPUs in the current system.Executorservice =Executors.newfixedthreadpool (Runtime.getruntime (). Availableprocessors ()*pool_size); System. out. println ("Server Startup"); }     Public voidService () { while(true) {Socket Socket=NULL; Try {                //receiving a client connection, as long as the customer is connected, the accept () is triggered and the connection is establishedSocket =serversocket.accept (); Executorservice.execute (NewHandler (socket)); } Catch(Exception e) {e.printstacktrace (); }        }    }     Public Static voidMain (string[] args) throws IOException {Newmultithreadserver (). Service (); }}

Multithreaded Java Socket Programming example

Multithreaded Java Socket Programming example