Optional<T> is a container that either holds a value or is empty. It makes the possibility of a missing value explicit in the type system, eliminating NullPointerExceptions caused by forgetting to check for null. Stream terminal operations like findFirst, min, max return Optional.
Creating Optional
Content is available with subscription.
Get full access to all courses on the platform for one year with a single payment.
▼
Unlike other platforms that charge per course, here you get everything for one price, and after one year of use there will be no automatic charge for the following year.