IntStream mapToLong() in Java
IntStream mapToLong() returns a LongStream consisting of the results of applying the given function to the elements of this stream.
Note : IntStream mapToLong() is a intermediate operation. These operations are always lazy. Intermediate operations are invoked on a Stream instance and after they finish their processing, they give a Stream instance as output.
LongStream mapToLong(IntToLongFunction mapper)
- LongStream : A sequence of primitive long-valued elements. This is the long primitive specialization of Stream.
- mapper : A stateless function to apply to each element.
Return Value : The function returns a LongStream consisting of the results of applying the given function to the elements of this stream.
Example 1 :
2 4 6 8 10
Example 2 :
2147483649 2147483651 2147483653 2147483655 2147483657
Example 3 :
-15 -14 -13 -12 -11
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