//  FileToNumbersAlternative.java  (c) 2005 Kari Laitinen

//  http://www.naturalprogramming.com

//  2005-11-19  File created.
//  2005-11-19  Last modification.

//  This program works like FileToNumbers.java but this one
//  does not use command line parameters.

import java.io.* ;
import java.util.* ;

class FileToNumbersAlternative
{
   public static void main( String[] not_in_use )
   {
      Scanner  keyboard  =  new Scanner( System.in ) ;

      System.out.print( "\n Please, give file name: " ) ;

      String given_file_name  =  keyboard.nextLine() ;

      try
      {
         FileInputStream file_to_read  =
                    new FileInputStream( given_file_name ) ;

         byte[]  bytes_from_file  =  new  byte[ 16 ] ;

         int number_of_bytes_read  ;

         while (( number_of_bytes_read  =
                    file_to_read.read( bytes_from_file ))  >  0 )
         {
            StringBuilder  line_of_bytes  =  new  StringBuilder() ;
            StringBuilder  bytes_as_characters  =  new  StringBuilder () ;

            for ( int byte_index  =  0 ;
                      byte_index  <  number_of_bytes_read ;
                      byte_index  ++ )
            {
               line_of_bytes.append(
                 String.format( " %02X", bytes_from_file[ byte_index ] ) ) ;

               char  byte_as_character  =
                               (char) bytes_from_file[ byte_index ] ;

               if ( byte_as_character  >=  ' ' )
               {
                  bytes_as_characters.append( byte_as_character ) ;
               }
               else
               {
                  bytes_as_characters.append( ' ' ) ;
               }
            }

            System.out.printf( "\n%-48s  %s", line_of_bytes,
                                              bytes_as_characters ) ;
         }

         file_to_read.close() ;
      }
      catch ( FileNotFoundException  caught_file_not_found_exception )
      {
         System.out.print( "\n Cannot open file "
                        +  given_file_name ) ;
      }
      catch ( IOException  caught_io_exception )
      {
         System.out.print( "\n Error while processing file "
                        +  given_file_name ) ;
      }
   }
}

/*  NOTES:

    This program uses Java 2 Standard Edition, Version 1.5 features.
    Compilation with older Java compilers is thus not possible.
*/