In Java, the OptionalInt
object is a container object that may or may not contain an integer
value.
The
OptionalInt
class is present in thejava.util
package.
empty()
methodThe empty
method is used to get the empty instance of the OptionalInt
class. The returned object does not have a value.
public static OptionalInt empty()
This method does not take any arguments.
This method returns an OptionalInt
object with an empty value.
The code below shows how to use the empty
method.
import java.util.OptionalInt;class OptionalIntEmptyExample {public static void main(String[] args) {OptionalInt optional = OptionalInt.empty();// print valueSystem.out.println("OptionalInt : " + optional);System.out.println("Has value: " + optional.isPresent());}}
In the code above:
Line 1: We imported the OptionalInt
class.
import java.util.OptionalInt;
Line 5: We used the empty
method to get an empty OptionalInt
object. The returned object doesn’t have any value.
OptionalInt optional = OptionalInt.empy();
Line 7: We printed the created OptionalInt
object.
System.out.println("OptionalInt: " + optional); // OptionalInt.empty
Line 8: We used the isPresent
method to check if the object contains a value. We will get false
as a result.
optional.isPresent(); // false