java.net.ConnectException: Connection refused in TCP socket? -

i have created program send file client server when running file in localhost works , can send file when sending file pc pc shows "java.net.connectexception: connection refused".

port number @ both side same , firewall off. port listening when client request connect server socket accepting socket.

thank in advance

code of program :

public class programsocket {      public programsocket(serversocket servsock) throws ioexception {          system.out.print("server started");         while (true) {             final socket sock;             try {                 sock = servsock.accept();             } catch (socketexception e) {                 break;             }             new thread(new runnable() {                 @override                 public void run() {                     try {                         connecttonewclient(sock);                     } catch (exception e) {                         e.printstacktrace();                     }                 }             }).start();         }          system.out.print("server stopped");      }      void connecttonewclient(socket sock) throws ioexception,     interruptedexception {           fileoutputstream fos = new fileoutputstream("c:/abc.txt");          bufferedoutputstream bos = new bufferedoutputstream(fos);         int bytesread = is.read(mybytearray, 0, mybytearray.length);         bos.write(mybytearray, 0, bytesread);         bos.close();           sock.close();     } } 

client side :

public string uploadfile(string filepath) throws exception {     socket sock = new socket(ip, 24999);      // select file     file myfile = new file(filepath);       // send program file     byte[] mybytearray = new byte[(int) myfile.length()];     bufferedinputstream bis = new bufferedinputstream(     new fileinputstream(myfile));     outputstream os = sock.getoutputstream();     bis.read(mybytearray, 0, mybytearray.length);     os = sock.getoutputstream();     os.write(mybytearray, 0, mybytearray.length);     os.flush();     bis.close();      sock.close();      return message;  } 

omitted code brevity.