Computer scienceProgramming languagesJavaCode organizationObject-oriented programmingClass hierarchiesOverriding methods

Covariant return types

Theory

What does the feature mean

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What does the feature covariant return type mean?

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A child class cannot have a different return type for the overriding method, only the same one as in the base class.

A child class can have a different return type for the overriding method, but the child’s return type should be a super-type of the parent’s return type.

A child class can have a different return type for the overriding method, but the child’s return type should be a sub-type of the parent’s return type.

A child class cannot have the same return type for a overriding method.

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