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DoubleStream mapToObj() method in Java
The mapToObj() method of the DoubleStream class returns an object-valued Stream consisting of the results of applying the given function to the elements of this stream.
The syntax is as follows −
<U> Stream<U> mapToObj(DoubleFunction<? extends U> mapper)
Here, the mapper is a stateless function to apply to each element and <U> is the element type of the new stream. The DoubleFunction signifies a function that accepts a double-valued argument and produces a result.
To work with DoubleStream class in Java, import the following page −
import java.util.stream.DoubleStream;
The following is an example to implement DoubleStream mapToObj() method −
Example
import java.util.*;
import java.util.stream.DoubleStream;
public class Demo {
public static void main(String[] args) {
DoubleStream doubleStream = DoubleStream.of(15.2, 20.8, 45.5, 55.7, 88.3, 92.7);
doubleStream.mapToObj(a ->{return a + a ;}).forEach(System.out::println);
}
}Output
30.4 41.6 91.0 111.4 176.6 185.4
Updated on: 30-Jul-2019
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