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From: liyaohua.bupt@gmail.com
Newsgroups: comp.lang.java.programmer
Subject: Re: Socket problem: read & write to same socket
Date: Tue, 13 Mar 2012 09:30:18 -0700 (PDT)
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It works! Thanks! It busted me for quite a while.

On Tuesday, March 13, 2012 11:14:36 AM UTC-5, Arne Vajh=F8j wrote:
> On 3/13/2012 12:01 PM, liyaohua.bupt@gmail.com wrote:
> > I want to establish connection to a server(written by myself in Go lang=
uage), read from socket, and then write into socket.
> >
> > The connection can be established, and it reads correctly. But after th=
at and when I want to write to socket, it closes the connection. I used wir=
eshark to listen to the packets. I saw my program sent a FIN to the server =
side. So the server receives nothing.
> >
> > Note that the server side only sends one line into socket.
> >
> > I later wrote a server in Java and a client in Go. They work fine in bo=
th read and write.
>=20
> > import java.io.BufferedReader;
> > import java.io.BufferedWriter;
> > import java.io.IOException;
> > import java.io.InputStreamReader;
> > import java.io.OutputStreamWriter;
> > import java.io.PrintWriter;
> > import java.net.Socket;
> > import java.net.UnknownHostException;
> >
> > public class DeserializerTester {
> > 	public static void main(String[] args) throws IOException {
> > 		// TODO Auto-generated method stub
> > 		Socket s =3D null;
> > 		BufferedReader in =3D null;
> > 		BufferedWriter out =3D null;
> > 		//PrintWriter out =3D null;
> >
> > 		try {
> > 			s =3D new Socket("127.0.0.1", 9999);
> > 			in =3D new BufferedReader(new InputStreamReader(s.getInputStream()))=
;
> > 			//out =3D new PrintWriter(s.getOutputStream(), false);
> > 			out =3D new BufferedWriter(new OutputStreamWriter(s.getOutputStream(=
)));
> > 		} catch (UnknownHostException e) {
> > 			System.err.println("Unknown host");
> > 			System.exit(0);
> > 		} catch (IOException e) {
> > 			System.err.println("IO error");
> > 			System.exit(1);
> > 		}
> >
> > 		String msg =3D "";
> >
> > 		msg =3D in.readLine();
> > 		System.out.println(msg);
> >
> > 		out.write("\"hi, socket\"");
>=20
> Try:
>=20
> out.flush();
>=20
> here.
>=20
> > 		s.close();
> > 	}
> >
> > }
>=20
> Arne