beginnerPremium
Optional
Represent an absent return value explicitly
Unlock every Java skribble and video: one purchase, yours to keep.
$29 USD
Optional wraps a value that might be absent. It forces you to handle the empty case explicitly.
Watch
The narrated version of this skribble — tap play for the full-size video.
1:42
Optional
Premium skribble
The preview above is intentionally blurred. Unlock the full-resolution skribble and its deep-dive board with TechSkribble.
Unlock this course Already purchased? Sign in
