public String toString(){
  String s="KeyIdentifier [\n";
  HexDumpEncoder encoder=new HexDumpEncoder();
  s+=encoder.encodeBuffer(octetString);
  s+="]\n";
  return (s);
}

public String toString ( ) { String s = "KeyIdentifier [\n" ; HexDumpEncoder encoder = new HexDumpEncoder ( ) ; s += encoder . encodeBuffer ( octetString ) ; s += "]\n" ; return ( s ) ; }
returns a printable representation of the keyusage .
