Optional empty() method in Java with examples
Last Updated :
30 Jul, 2019
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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:
Java
Java
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);
}
}
Output:
Program 2:
Optional: Optional.empty
// 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);
}
}
Output:
Reference: https://docs.oracle.com/javase/9/docs/api/java/util/Optional.html#empty--
Optional: Optional.empty
