public int hashCode()

// Java program to demonstrate
// OptionalInt.hashCode() method
  
import java.util.OptionalInt;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a OptionalInt instance
        OptionalInt opInt
            = OptionalInt.of(253);
  
        System.out.println("OptionalInt: "
                           + opInt.toString());
  
        // get hashCode value using hashCode()
        System.out.println("HashCode value: "
                           + opInt.hashCode());
    }
}

OptionalInt: OptionalInt[253]
HashCode value: 253

// Java program to demonstrate
// OptionalInt.hashCode() method
  
import java.util.OptionalInt;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // create a OptionalInt instance
        OptionalInt opInt
            = OptionalInt.empty();
  
        System.out.println("OptionalInt: "
                           + opInt.toString());
  
        // get hashCode value using hashCode()
        System.out.println("HashCode value: "
                           + opInt.hashCode());
    }
}

OptionalInt: OptionalInt.empty
HashCode value: 0