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

public class client_c
{

  public static void close_client(
    Socket client )
  {
    try
    {
      client.close();
    }
    catch ( Exception exc )
    {
    }
  } // close_client

  public static void close_reader(
    BufferedReader reader )
  {
    try
    {
      reader.close();
    }
    catch ( Exception exc )
    {
    }
  } // close_reader

  public static void main( String args[] )
  {
    if ( args.length != 1 )
    {
      System.out.println( 
        "Ange IP-adress eller maskinnamn" );
      System.exit( 1 );
    ////////////////////
    }

    Socket client = null;
    PrintWriter writer = null;
    BufferedReader reader = null;
    BufferedReader kbd_reader = null;

    try
    {
      System.out.println( "Koplar upp ..." );
      client = new Socket( args[0], 2747 );
      writer = new PrintWriter(
        client.getOutputStream(), true );
      reader = new BufferedReader(
        new InputStreamReader(    
          client.getInputStream() ) );
      kbd_reader = new BufferedReader(
        new InputStreamReader(    
          System.in ) );
    } // try

    catch ( UnknownHostException exc )
    {
      System.out.println( 
        "Kan inte koppla upp mot " + args[0] );
      System.exit( 1 );
    ////////////////////
    } // catch

    catch ( IOException exc )
    {
      System.out.println( 
        "IO-fel mot " + args[0] );
      close_client( client );
      if ( writer != null )
      {
        writer.close();
        close_reader( reader );
        close_reader( kbd_reader );
      } // if
      System.exit( 1 );
    ////////////////////
    } // catch

    System.out.println( 
     "OK. Klientsidan ansluten" );
    try
    {
      System.out.print( "Skriv HEJ!" );
      String buf = kbd_reader.readLine();
      while ( buf.length() > 0 )
      {
        writer.println( buf );
        String from_server = reader.readLine();
        System.out.println( from_server );

        System.out.print( "Skriv HEJ!" );
        buf = kbd_reader.readLine();
      } // while
    } // try
    catch ( Exception exc )
    {
      exc.printStackTrace();
    } // catch

    finally
    {
      writer.close();
      close_reader( reader );
      close_reader( kbd_reader );
      close_client( client );
    } // finally
  } // main
} // client_c