자바 스트림 API- 중간처리(3)_boxed/asDoubleStream()

int[] arr = {1,2,3,4,5};

boxed() : 기본형 ⇒ 참조형

//가. boxed(): int ---> Integer
        IntStream s = Arrays.stream(arr);
        s.boxed()
         .forEach(System.out::println);

//1
//2
//3
//4
//5

asDoubleStream()

• IntStream => DoubleStream
• LongStream => DoubleStream

//나. asDoubleStream(): 정수 ---> 실수
        Arrays.stream(arr)
                .asDoubleStream()
                .forEach(System.out::println);

//1.0
//2.0
//3.0
//4.0
//5.0