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Asked: 2026-05-23T09:12:05+00:00

I am having a scenario where there are several subclasses which have got similar

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I am having a scenario where there are several subclasses which have got similar implementations and some extra methods for which the implementations differ with each subclass. I assume that an abstract class would be a good choice for this scenario. But would it be better if that abstract class implements an interface which contains all method declarations.Or should I just stick with the abstract class instead.

In short, I would like to know the scenarios where I should prefer Abstract classes at the top of the hierarchy rather than an Interface.

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1 Answer

  1. Editorial Team

    Use the abstract class if your subclasses have is-a relationship with the abstract class.

    You can have both an abstract class and an interface – the abstract class specifying implementations, and the interface specifying the API.

    The collections frameworks is an example of that – it has ArrayList extends AbstractList implements List

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