//  BytesFromFile.java  Copyright (c) 2005 Kari Laitinen

//  http://www.naturalprogramming.com

//  2005-06-28   File created.
//  2005-06-28   Last modification.

import java.util.* ;
import java.io.* ;    // Classes for file handling.

class  BytesFromFile
{
   public static void main( String[] command_line_parameters )
   {
      if ( command_line_parameters.length  ==  1 )
      {
         try
         {
            FileInputStream file_to_read  =  new
                           FileInputStream( command_line_parameters[ 0 ] ) ;

            byte[]  bytes_from_file  =  new  byte[ 50 ] ;

            int  file_size_in_bytes  =  0 ;

            boolean  bytes_still_available_in_file  =  true ;

            while ( bytes_still_available_in_file  ==  true )
            {
               int  number_of_bytes_read  = 
                                    file_to_read.read( bytes_from_file ) ;

               if ( number_of_bytes_read  >  0 )
               {
                  file_size_in_bytes  =  file_size_in_bytes  +
                                         number_of_bytes_read ;

                  System.out.print( " " + number_of_bytes_read ) ;

                  //  This loop does not do anything to the read data.
               }
               else
               {
                  bytes_still_available_in_file  =  false ;
               }
            }

            System.out.print( "\n "  +  file_size_in_bytes  
                        +  " is the file size.  " ) ;

            file_to_read.close() ;
         }
         catch ( Exception  caught_exception )
         {
            System.out.print( "\n Cannot process file "
                        +  command_line_parameters[ 0 ] ) ;
         }
      }
      else
      {
         System.out.print( "\n You have to command this program as: \n"
                     +  "\n  BytesFromFile file.ext \n") ;
      }
   }
}