/* Stringbuffers

Characters can be held in Strings (immutable), Character
Arrays ( char []) if you want to handle them as a series of
individual characters, or Stringbuffers. A Stringbuffer is
an object in which you can handles Strings as a whole, with
facilities to extend and alter them in situ.

This example reads a series of user inputs which it builds into
a string buffer ... and it then converts it to a string from
which it extracts the text in justified lines. */

public class malmesbury
   {
   public static void main(String[] args)
      {
      System.out.print
            ("Please enter a paragraph : ");
      String you_said;

// Create a string buffer, and initialise it empty
      StringBuffer paragraph = new StringBuffer("");

// read from the user until he enters a blank line
// build up entries in the stringbuffer
      while (!((you_said =
                WellHouseInput.readLine())).equals(""))
         {
         paragraph.append(you_said);
         paragraph.append(" ");
         }

// convert back to a string so that we can print re-justified
      String textblock = paragraph.toString();

/*
(The rest of the example contains nothing new ...
we are just extracting word-by-word and composing lines of output.) */

      int old_posn=0,posn=0,line_posn=0;
      while (posn>=0)
         {
         posn = textblock.indexOf(' ',old_posn);
         String next_word = (posn>0) ?
textblock.substring(old_posn,posn+1):
               textblock.substring(old_posn);
         if ((next_word.length()+line_posn)>30)
            {
            line_posn=0;
            System.out.println("");
            }
         System.out.print(next_word);
         old_posn = posn + 1;
         line_posn+=next_word.length();
         }
         System.out.println("");
   }
}

/* Sample output

munchkin:j707 grahamellis$ java malmesbury
Please enter a paragraph : The esamples in this section
of the notes are all being supplied with additional material
which includes sample output showing how they run.

The esamples in this section
of the notes are all being
supplied with additional
material which includes
sample output showing how
they run.
munchkin:j707 grahamellis$

*/