Question

What is the actual use of interface in Java?

Answer 1

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Interfaces are more flexible, because a class can implement multipleinterfaces. Since Java does not havemultiple inheritance, using abstract classes prevents your users from using any other class hierarchy. In general, prefer interfaces when there are no default implementations or state.

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Answer 2

Interfaces are more flexible because a class can implement multiple interfaces.Since java does not have multiple inheritence using abstract classes prevent your users from using any other class hierarchy. In general,prefer interfaces when there are no default implementations or states.