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LongStream mapToDouble() method in Java
The mapToDouble() method returns a DoubleStream consisting of the results of applying the given function to the elements of this stream.
The syntax is as follows:
DoubleStream mapToDouble(LongToDoubleFunction mapper)
The parameter mapper is a stateless function to apply to each element.
To use the LongStream class in Java, import the following package:
import java.util.stream.LongStream;
The following is an example to implement LongStream mapToDouble() method in Java
Example
import java.util.stream.LongStream;
import java.util.stream.DoubleStream;
public class Demo {
public static void main(String[] args) {
LongStream longStream = LongStream.of(5000L, 12000L, 15000L, 20000L, 25000L);
DoubleStream s = longStream.mapToDouble(a → (double)a);
System.out.println("Elements of DoubleStream...");
s.forEach(System.out::println);
}
}output
Elements of DoubleStream... 5000.0 12000.0 15000.0 20000.0 25000.0
Updated on: 30-Jul-2019
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