final class with final static methods redundant

Question

I have a bunch of static final methods within a final class:

public class final Util{

    private Util{}

    // do I need the keyword final when the class is already final
    public static final util1{..}
    public static final util2{..}
    public static final util3{..}

}

I know, instance methods are implicitly final when its class is final. However, is this the case also for static methods?

Static methods are always final (you cannot override them in child classes) — knittl, Feb 06 '21 at 15:03
Static methods (without final) can be overriden (can be hidden).There is a difference of making static methods final or not final. — nimo23, Feb 06 '21 at 15:04
I stand corrected. I was not aware of this fact. Thanks! (https://stackoverflow.com/q/1743715/112968) — knittl, Feb 06 '21 at 15:06

knittl · Accepted Answer · 2021-02-06T15:25:57.503

3

Final classes cannot be extended in the first place, so it does not matter whether or not their methods are marked as final.

For example, this will fail:

final class Util {
}
class Extra extends Util {
}

error: cannot inherit from final Util
class Extra extends Util {

edited Feb 06 '21 at 15:25

answered Feb 06 '21 at 15:11

knittl

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Static methods (without final) can be overriden (can be hidden).There is a difference of making static methods final or not final – nimo23 Feb 06 '21 at 15:23
@nimo23 but you cannot extend the class, so there is nowhere to "hide" them from. You are never able to generate a conflict, because final classes cannot have subclasses. – knittl Feb 06 '21 at 15:24

final class with final static methods redundant

1 Answers1