The hashCode() method help us to get the hash code of the value, if Long value is present, otherwise 0 (zero) if no Long value is present in OptionalLong object. Syntax:
public int hashCode()
Parameters: This method does not accepts any parameter. Return value: This method returns hash code value of the present value or 0 if no value is present. Below programs illustrate hashCode() method: Program 1:
Java
// Java program to demonstrate// OptionalLong.hashCode() methodimport java.util.OptionalLong;public class GFG { public static void main(String[] args) { // create a OptionalLong instance OptionalLong opLong = OptionalLong.of(253255); System.out.println("OptionalLong: " + opLong.toString()); // get hashCode value using hashCode() System.out.println("HashCode value: " + opLong.hashCode()); }} |
Output:
OptionalLong: OptionalLong[253255] HashCode value: 253255
Program 2:
Java
// Java program to demonstrate// OptionalLong.hashCode() methodimport java.util.OptionalLong;public class GFG { public static void main(String[] args) { // create a OptionalLong instance OptionalLong opLong = OptionalLong.empty(); System.out.println("OptionalLong: " + opLong.toString()); // get hashCode value using hashCode() System.out.println("HashCode value: " + opLong.hashCode()); }} |
Output:
OptionalLong: OptionalLong.empty HashCode value: 0
References: https://docs.oracle.com/javase/10/docs/api/java/util/OptionalLong.html#hashCode()
