SampleClient.java

      //  $Id$
      
      import java.io.*;
      import java.net.*;
      
      //  Class SampleClient
      //  ------------------------------------------------------------------
      /**
        *     This is a sample client for communicating with a server using
        *     a stream socket.  The stream socket is a network connection,
        *     but for this application, the server must be running on the
        *     same computer as this client.
        *
        *     $Log$
        *     
        *     @author C. Vickery
        */
        public class SampleClient
        {
          //  main()
          //  --------------------------------------------------------------
          /**
            *     If a port number is given as a command line argument, use
            *     it.  Otherwise, the default port number is 0x8000 (32768).
            *
            *     Connects to the server, then reads lines from the user and
            *     writes them to the server.  The user can exit by typing
            *     Control-D at the beginning of a line (normal termination),
            *     or by typing Control-C any time (abnormal termination.)
            *     
            *     @param  args  The command line arguments.  If args[0] is
            *                   available, it specifies a port number.
            *     @throws       IOException if anything goes wrong while
            *                   communciating with the server.
            *     @throws       UnsupportedEncodingException if there is a
            *                   bug in the code.
            */
            public static void main(String[] args ) throws 
                                   IOException, UnsupportedEncodingException
            {
              //  Decide what port to use
              int port = 0x8000;
              if (args.length > 0)
                port = Integer.parseInt( args[0] );
              
              //  Connect to the server if possible
              InetAddress ia = InetAddress.getLocalHost();
              Socket s = new Socket( ia, port );
              System.out.println( "Connected to " + ia + " port " + port );
      
              //  Read lines from stdin and write them to the server.
              OutputStream os = s.getOutputStream();
              BufferedReader br = 
                    new BufferedReader( new InputStreamReader( System.in ));
              String str = null;
              while ( null != (str = br.readLine() ) )  // Loop until EOF.
              {
                byte[] bytes = str.getBytes();
                os.write( bytes );
      
                //  Exit if the user typed "SHUT"
                if ( str.equals( "SHUT" ) )
                  System.exit( 0 );
              }
              s.close();
              System.exit( 0 );
            }
        }