The hashCode() method of
java.util.Optional class in Java is used to get the hashCode value of this Optional instance. If there is no value present in this Optional instance, then this method returns 0.
Syntax:
public int hashCode()
Parameter: This method do not accepts any parameter.
Return Value: This method returns the
hashCode value of this Optional instance. If there is no value present in this Optional instance, then this method returns 0.
Exception: This method do not throw any Exception.
Program 1:
Output:
Optional: Optional[456]
Optional hashCode value: 456
Program 2:
