code: public static <E> StringBuffer join( String glue, Collection<E> charSequences )
    {
      StringBuffer buf = new StringBuffer();
      int i = 0;
      for( Object charSequence : charSequences )
      {
        if( i > 0 )
        {
          buf.append( glue );
        }
        buf.append( charSequence );
        i++;
      }
      return buf;
    }
docs: Takes a string 'glue' and collection of CharSequences, and returns a StringBuffer containing the CharSequences
  joined with the glue between each of them. They are joined in the order returned by the iterator of the colection
  
  @param glue          The glue string
  @param charSequences The CharSequences to join
  
  @return a StringBuffer