multithreading - Java socketserver how to test? -

i want receive text files through socket connection in java, set server end before continue client know if code made works, except have no idea how test this.

any appreciated..

edit: know port open , listening requests, want test happens if receives anything, create file input , can test simulation(sending file or bytes dont know)?

public class server {      private static int port = 8080;     private static int maxconnections = 100000;      // listen incoming connections , handle them     public static void startserver() {         int = 0;          try {             serversocket listener = new serversocket(port);             socket server;              system.out.println("started server on port:" + port);              while ((i++ < maxconnections) || (maxconnections == 0)) {                 runserver connection;                  server = listener.accept();                 runserver conn_c = new runserver(server);                 thread t = new thread(conn_c);                 t.start();                  system.out.println("created new thread");             }         } catch (ioexception e) {             e.printstacktrace();         }     }  }  class runserver implements runnable {     private socket server;      runserver(socket server) {         this.server = server;     }      public void run() {         int bytesread;         int current = 0;         bufferedoutputstream bufferedoutputstream = null;         fileoutputstream fileoutputstream = null;         datainputstream clientdata = null;         file file = null;          try {             // creating connection.             system.out.println("connected.");              // receive file             byte[] bytearray = new byte[6022386];             system.out.println("please wait downloading file");              // reading file socket             inputstream inputstream = server.getinputstream();             file = new file("toread.txt");             clientdata = new datainputstream(inputstream);             fileoutputstream = new fileoutputstream(file);             bufferedoutputstream = new bufferedoutputstream(fileoutputstream);             bytesread = inputstream.read(bytearray, 0, bytearray.length);              current = bytesread;             {                 bytesread = inputstream.read(bytearray, current, (bytearray.length - current));                 if (bytesread >= 0)                     current += bytesread;             } while (bytesread > -1);              bufferedoutputstream.write(bytearray, 0, current);             bufferedoutputstream.flush();              readerhelper.readtextfile(file);          } catch (ioexception e) {             e.printstacktrace();         } catch (numberformatexception e) {             e.printstacktrace();         } catch (sqlexception e) {             e.printstacktrace();         } {             try {                 if (fileoutputstream != null)                     fileoutputstream.close();                 if (bufferedoutputstream != null)                     bufferedoutputstream.close();                 if (clientdata != null)                     clientdata.close();                 if (server != null)                     server.close();             } catch (ioexception e) {                 e.printstacktrace();             }         }     } 

well, socket on port 8080 right?

you can open browser , type: http://localhost:8080. browser create connection , line

server = listener.accept();

will "unlock". if wanna test if socket listenning do. reading stream see first message of http protocol.