Java Streams - LongStream mapToDouble (LongToDoubleFunction mapper)

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LongStream mapToDouble(LongToDoubleFunction mapper) returns a DoubleStream by applying the given function. This is an intermediate operation.

Syntax

mapToDouble has the following syntax.

DoubleStream mapToDouble(LongToDoubleFunction mapper)

Example

The following example shows how to use mapToDouble.

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.mapToDouble(n -> Math.sin(n)).forEach(System.out::println);
  }
}

The code above generates the following result.

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