OptionalDouble help us to create an object which may or may not contain a Double value. The empty() method returns an empty OptionalDouble instance. No value is present for this OptionalDouble. So we can say that this method help us to create empty OptionalDouble object.
Syntax:
public static OptionalDouble empty()
Parameters: This method accepts nothing.
Return value: This method returns an empty OptionalDouble.
Below programs illustrate empty() method:
Program 1:
// Java program to demonstrate// OptionalDouble.empty() method  import java.util.OptionalDouble;  public class GFG {      public static void main(String[] args)    {          // create a OptionalDouble        // using empty method        OptionalDouble opDouble            = OptionalDouble.empty();          // Print the created instance        System.out.println("OptionalDouble: "                           + opDouble.toString());    }} |
Output:
OptionalDouble: OptionalDouble.empty
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalDouble.html#empty()
