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[20210225] Java Stream #50

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JuHyun419 opened this issue Feb 25, 2021 · 0 comments

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Java

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JuHyun419 commented Feb 25, 2021

int[] to Set, List ...

Set<Integer> set =
        Arrays.stream(nums).boxed().collect(Collectors.toCollection(HashSet::new));

toCollection(): 컬렉션 프레임워크의 특정 구현체로 생성 가능
toSet(), toList(), toMap() 등은 구현체 X
boxed(): 박싱
- int -> Integer
- long -> Long
- double -> Double

JuHyun419 added the Java label

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