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()
