public DoubleDatatypeValidator ( DatatypeValidator base, Hashtable facets, boolean derivedByList ) throws InvalidDatatypeFacetException  { super(base, facets, derivedByList);
public DoubleDatatypeValidator () throws InvalidDatatypeFacetException { this( null, null, false );
    public DoubleDatatypeValidator ( DatatypeValidator base, Hashtable facets,                                     boolean derivedByList ) throws InvalidDatatypeFacetException  {        super(base, facets, derivedByList);    }