The orElse(double) method helps us to get the value in this OptionalDouble object. If a value is not present in this OptionalDouble, then this method returns the value passed as the parameter. Syntax:
public double orElse(double other)
Parameters: This method accepts double the value to be returned, if no value is present. Return value: This method returns the value, if present, otherwise other. Below programs illustrate toString() method: Program 1:Â
Java
// Java program to demonstrate// OptionalDouble.orElse(double) methodÂ
import java.util.OptionalDouble;Â
public class GFG {Â
    public static void main(String[] args)    {Â
        // create a OptionalDouble        OptionalDouble opDouble = OptionalDouble.of(452146);Â
        // get value using orElse        double value = opDouble.orElse(13421);Â
        // print double value        System.out.println("value: " + value);    }} |
Output:
value: 452146.0
Program 2:Â
Java
// Java program to demonstrate// OptionalDouble.orElse(double) methodÂ
import java.util.OptionalDouble;Â
public class GFG {Â
    public static void main(String[] args)    {Â
        // create a OptionalDouble        OptionalDouble opDouble = OptionalDouble.empty();Â
        // get value using orElse        double value = opDouble.orElse(13421);Â
        // print double value        System.out.println("value: " + value);    }} |
Output:
value: 13421.0
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalDouble.html#orElse(double)
