Why don't we just add a generic method which compares any instances of
Comparable?
public interface Comparator<T> {
...
public static <T extends Comparable<? super T>> boolean equal(T x, T y) {
return x.compareTo(y) == 0;
}
}
Usage:
Comparator.equal(1, 1); // true
Comparator.equal(1.0, 1.0); // true
Comparator.equal(2.0f, 2.0f); // true
Comparator.equal("abc", "def"); // false
Comparator.equal("abc", 1); // compilation error
сб, 5 янв. 2019 г. в 09:33, <
some-java-user-99206970363698485...@vodafonemail.de>:
> Hello Remi,
> You are right, the proposed method names would prevent backwards
> compatibility, I forgot to think
> about that. Sorry for the trouble.
> Maybe a different, currently not used name, such as `areEqual`,
> `primitiveEquals` or similar would
> be better.
> What do You think about the addition of such a method?
>
> Kind regards
>
> > Remi Forax <fo...@univ-mlv.fr> hat am 5. Januar 2019 um 00:50
> geschrieben:
> >
> >
> > Hi,
> > it's not obvious to me that this is a source backward compatible change.
> >
> > if you have something like:
> > interface Fun { boolean eq(Double a, double b); }
> > ...
> > Fun fun = Double::equals;
> >
> > it's not clear to me which variant will be selected ?
> >
> > regards,
> > Rémi
>
