Java Streams - LongStream mapToInt(LongToIntFunction mapper) example

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LongStream mapToInt(LongToIntFunction mapper) returns an IntStream by applying the given function. This is an intermediate operation.

Syntax

mapToInt has the following syntax.

IntStream mapToInt(LongToIntFunction mapper)

Example

The following example shows how to use mapToInt.

import java.util.stream.LongStream;

public class Main {
  public static void main(String[] args) {
    LongStream b = LongStream.of(1L, 2L, Long.MAX_VALUE, Long.MIN_VALUE);

    b.mapToInt(n -> {return (int)n;}).forEach(System.out::println);
  }
}

The code above generates the following result.

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