OptionalDouble stream() method in Java with examples Last Updated : 28 May, 2019 Comments Improve Suggest changes Like Article Like Report The stream() method help us to get double value contain by OptionalDouble as DoubleStream.If a value is present, method returns a sequential DoubleStream containing only that value, otherwise returns an empty DoubleStream. Syntax: public DoubleStream stream() Parameters: This method accepts nothing. Return value: This method returns the optional value as an DoubleStream. Below programs illustrate stream() method: Program 1: Java // Java program to demonstrate // OptionalDouble.stream() method import java.util.OptionalDouble; import java.util.stream.DoubleStream; public class GFG { public static void main(String[] args) { // create a OptionalDouble OptionalDouble opDouble = OptionalDouble.of(.3203); // get value as stream DoubleStream out = opDouble.stream(); // print value System.out.print("Value: "); out.forEach(System.out::print); } } Output: Program 2: Java // Java program to demonstrate // OptionalDouble.stream() method import java.util.OptionalDouble; import java.util.stream.DoubleStream; public class GFG { public static void main(String[] args) { // create a empty OptionalDouble OptionalDouble opDouble = OptionalDouble.empty(); // get value as stream DoubleStream out = opDouble.stream(); // print value System.out.print("length of Double Stream: " + out.count()); } } Output: References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalDouble.html#empty() Comment More infoAdvertise with us Next Article OptionalLong stream() method in Java with examples A AmanSingh2210 Follow Improve Article Tags : Java Java - util package Java-Functions Java-OptionalDouble Practice Tags : Java Similar Reads Optional stream() method in Java with examples The stream() method of java.util.Optional class in Java is used to get the sequential stream of the only value present in this Optional instance. If there is no value present in this Optional instance, then this method returns returns an empty Stream. Syntax: public Stream<T> stream() Paramete 2 min read Optional stream() method in Java with examples The stream() method of java.util.Optional class in Java is used to get the sequential stream of the only value present in this Optional instance. If there is no value present in this Optional instance, then this method returns returns an empty Stream. Syntax: public Stream<T> stream() Paramete 2 min read OptionalLong stream() method in Java with examples The stream() method help us to get Long value contain by OptionalLong as LongStream.If a value is present, method returns a sequential LongStream containing only that value, otherwise returns an empty LongStream. Syntax: public LongStream stream() Parameters: This method accepts nothing. Return valu 1 min read OptionalLong stream() method in Java with examples The stream() method help us to get Long value contain by OptionalLong as LongStream.If a value is present, method returns a sequential LongStream containing only that value, otherwise returns an empty LongStream. Syntax: public LongStream stream() Parameters: This method accepts nothing. Return valu 1 min read OptionalInt stream() method in Java with examples The stream() method help us to get value contain by OptionalInt as IntStream. If a value is present, method returns a sequential IntStream containing only that value, otherwise returns an empty IntStream. Syntax: public IntStream stream() Parameters: This method accepts nothing. Return value: This m 1 min read OptionalInt stream() method in Java with examples The stream() method help us to get value contain by OptionalInt as IntStream. If a value is present, method returns a sequential IntStream containing only that value, otherwise returns an empty IntStream. Syntax: public IntStream stream() Parameters: This method accepts nothing. Return value: This m 1 min read Like