// Purpose.  ServerSocket demo  [source: Hortsmann98, p140]

import java.io.*;
import java.net.*;

public class ServerSocketDemo {
   public static void main( String[] args ) {
      try {
         ServerSocket   server = new ServerSocket( 8189 );
         Socket         socket = server.accept();
         BufferedReader in     = new BufferedReader( 
                           new InputStreamReader( socket.getInputStream() ) );
         PrintWriter    out    = new PrintWriter(
                           socket.getOutputStream(), true /* auto-flush */ );
         while (true) {
            out.println( "   Enter text or 'x' to exit -" );
            String str = in.readLine();
            if (str == null)       break;
            if (str.equals( "x" )) break;
            System.out.println( "---" + str + "---" );
            out.println( "   ---" + str + "---" );
         }
         socket.close();

      } catch( IOException e ) {
         e.printStackTrace();
      }
   }
}

// C:> java ServerSocketDemo
// ---here is first line---
// ---and a second line---

// C:> telnet
//        Terminal - Preferences - Local Echo
//        host: 127.0.0.1
//        port: 8189
//        Connect
//
//    Enter text or 'x' to exit -
// here is first line
//    ---here is first line---
//    Enter text or 'x' to exit -
// and a second line
//    ---and a second line---
//    Enter text or 'x' to exit -
// x