ChatClient for SO question

package com.j256.ormlite;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;

public class ChatClient {
    private static int port = 8001;
    private static String host = "localhost";

    private static BufferedReader stdIn;

    public static void main(String[] args) throws IOException {

        Socket server = null;

        try {
            server = new Socket(host, port);
        } catch (UnknownHostException e) {
            System.err.println(e);
            System.exit(1);
        }

        stdIn = new BufferedReader(new InputStreamReader(System.in));

        PrintWriter out = new PrintWriter(server.getOutputStream(), true);
        BufferedReader in = new BufferedReader(new InputStreamReader(server.getInputStream()));

        System.out.print("Autore: ");
        String auth = stdIn.readLine();
        out.println("Autore: " + auth);
        String serverResponse = in.readLine();
        System.out.println(serverResponse);

        if (serverResponse.startsWith("SERVER: Benvenuto")) {
            /* create a thread to asyncronously read messages from the server */
            ServerConn sc = new ServerConn(server);
            Thread t = new Thread(sc);
            t.start();

            /* loop reading messages from stdin and sending them to the server */
            System.out.println("Reading from stdin");
            while (true) {
                String msg = stdIn.readLine();
                if (msg == null || msg.equals("quit")) {
                    break;
                }
                System.out.println("Read from stdin: " + msg);
                out.println(msg);
            }
            System.out.println("Exit.");
            server.close();
        } else {
            System.out.println("Exit.");
            System.out.println("---Client Error---");
        }
    }

    private static class ServerConn implements Runnable {
        private BufferedReader in = null;
        private Socket server;

        public ServerConn(Socket s) throws IOException {
            server = s;
            in = new BufferedReader(new InputStreamReader(s.getInputStream()));
        }

        public void run() {
            try {
                /*
                 * loop reading messages from the server and show them on stdout
                 */
                while (true) {
                    String msg = in.readLine();
                    if (msg == null || msg.equals("quit")) {
                        break;
                    }
                    System.out.println(msg);
                }
                System.out.println("Closing server reader");
                this.close();
            } catch (IOException e) {
                System.err.println(e);
            }
        }

        public void close() throws IOException {
            in.close();
            server.close();
        }
    }
}