About Question enthuware.ocpjp.v8.2.1898 :

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About Question enthuware.ocpjp.v8.2.1898 :

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Why does IntStream's average() return OptionalDouble but Collectors.averagingInt() returns a double? Any reason?
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Re: About Question enthuware.ocpjp.v8.2.1898 :

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Not sure but most likely it is because of some theme they were following while designing the API.
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