Optional empty() method in Java with examples
The empty() method of java.util.Optional class in Java is used to get an empty instance of this Optional class. This instance do not contain any value.
Syntax:
public static <T> Optional<T> empty()
Parameters: This method accepts nothing.
Return value: This method returns an empty instance of this Optional class.
Below programs illustrate empty() method:
Program 1:
// Java program to demonstrate // Optional.empty() method import java.util.*; public class GFG { public static void main(String[] args) { // create a Optional Optional<Integer> op = Optional.empty(); // print value System.out.println( "Optional: " + op); } } |
Optional: Optional.empty
Program 2:
// Java program to demonstrate // Optional.empty() method import java.util.*; public class GFG { public static void main(String[] args) { // create a Optional Optional<String> op = Optional.empty(); // print value System.out.println( "Optional: " + op); } } |
Optional: Optional.empty
Reference: https://docs.oracle.com/javase/9/docs/api/java/util/Optional.html#empty–
Recommended Posts:
- Optional or() method in Java with examples
- Optional get() method in Java with examples
- Optional of() method in Java with examples
- Optional orElseGet() method in Java with examples
- Optional equals() method in Java with Examples
- Optional hashCode() method in Java with examples
- Optional orElse() method in Java with examples
- Optional ifPresentOrElse() method in Java with examples
- Optional orElseThrow() method in Java with examples
- Optional stream() method in Java with examples
- Optional filter() method in Java with examples
- Optional isPresent() method in Java with examples
- Optional toString() method in Java with examples
- Optional ofNullable() method in Java with examples
- OptionalInt empty() method in Java with examples
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.