Computer scienceProgramming languagesJavaCode organizationObject-oriented programmingClass hierarchiesOverriding methods

Covariant return types

When overriding

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When overriding, what should be the return type of the subclass method?

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a subclass method can return only the same type as the superclass method, neither its subclass, nor its superclass.

a subclass method can return the same type as the superclass method or its superclass.

a subclass method can return the same type as the superclass method or its subclass.

a subclass method can return the same type as the superclass method or its subclass, or its superclass.

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