> Interfaces are a way of breaking out. They're additive, rather than hierarchic... | Hacker News

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marcosdumay on May 9, 2019 | parent | context | favorite | on: Inheritance versus Composition

> Interfaces are a way of breaking out. They're additive, rather than hierarchical, from the implementing class perspective.

Java (and .Net by copying) choose to make interfaces additive and superclasses combinatorial. It's a design decision and in no way intrinsic. Other languages have different choices.

barrkel on May 9, 2019 [–]

Oh, I'm aware. However additive superclasses are much much worse for OOP, there's good reason languages beyond C++ haven't walked the same road.

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