public String toSpacedString(){
  final String original=toString();
  final StringBuilder builder=new StringBuilder();
  for (int i=0; i < original.length(); i++) {
    if (i > 0 && (i % 4) == 0)     builder.append(' ');
    builder.append(original.charAt(i));
  }
  return builder.toString();
}

public String toSpacedString ( ) { final String original = toString ( ) ; final StringBuilder builder = new StringBuilder ( ) ; for ( int i = 0 ; i < original . length ( ) ; i ++ ) { if ( i > 0 && ( i % 4 ) == 0 ) builder . append ( ' ' ) ; builder . append ( original . charAt ( i ) ) ; } return builder . toString ( ) ; }
return a spaced fingerprint representation of this hexdigest . ex : 1e0f 5874 2268 e82f c600 d81d 9064 07c5 7cc2 c3a7
