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 method returns the optional value as an IntStream.
Below programs illustrate stream() method:
Program 1:
// Java program to demonstrate// OptionalInt.stream() method import java.util.OptionalInt;import java.util.stream.IntStream; public class GFG { public static void main(String[] args) { // create a OptionalInt OptionalInt opInt = OptionalInt.of(452146); // get value as stream IntStream out = opInt.stream(); // print value System.out.println("Value:"); out.forEach(System.out::println); }} |
Output:
Program 2:
// Java program to demonstrate// OptionalInt.stream() method import java.util.OptionalInt;import java.util.stream.IntStream; public class GFG { public static void main(String[] args) { // create a OptionalInt OptionalInt opInt = OptionalInt.empty(); // get value as stream IntStream out = opInt.stream(); // print value if (out.count() == 0) System.out.println("opInt is empty"); }} |
Output:
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalInt.html#empty()
