The of(double) method help us to get an OptionalDouble object which contains a double value which is passed as a parameter to this method.
Syntax:
public static OptionalDouble of(double value)
Parameters: This method accepts a double value as parameter that will be set to the returned OptionalDouble object.
Return value: This method returns an OptionalDouble with the value present.
Below programs illustrate of(double) method:
Program 1:
// Java program to demonstrate// OptionalDouble.of(double) method  import java.util.OptionalDouble;  public class GFG {      public static void main(String[] args)    {          // Create a OptionalDouble instance        // using of() method        OptionalDouble opDouble            = OptionalDouble.of(45213.246);          // Get value of this OptionalDouble instance        System.out.println("OptionalDouble: "                           + opDouble);    }} |
Output:
OptionalDouble: OptionalDouble[45213.246]
Program 2:
// Java program to demonstrate// OptionalDouble.of(double) method  import java.util.OptionalDouble;  public class GFG {      public static void main(String[] args)    {          // Create a OptionalDouble instance        // using of() method        OptionalDouble opDouble            = OptionalDouble.of(21438999);          // Get value of this OptionalDouble instance        System.out.println("OptionalDouble: "                           + opDouble);    }} |
Output:
OptionalDouble: OptionalDouble[2.1438999E7]
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalDouble.html#of(double)
