Java Streams - IntStream mapToDouble (IntToDoubleFunction mapper)

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IntStream mapToDouble(IntToDoubleFunction mapper) returns a DoubleStream consisting of the results of applying the given function. This is an intermediate operation.

Syntax

mapToDouble has the following syntax.

DoubleStream mapToDouble(IntToDoubleFunction mapper)

Example

The following example shows how to use mapToDouble.

import java.util.stream.DoubleStream;
import java.util.stream.IntStream;
// w w  w.ja v  a  2 s  .  c om
public class Main {
  public static void main(String[] args) {
    IntStream i = IntStream.of(6,5,7,1, 2, 3, 3);
    DoubleStream d = i.mapToDouble(Math::sin);
    d.forEach(System.out::println);
  }
}

The code above generates the following result.

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