How to get IntelliJ to warn about unsafe usages of Optional.get()

Question

Some not-so-careful colleagues of mine have been passing around Optional instances and assuming it's safe to call get on them without calling isPresent first.

I know... this shouldn't happen, but the type-system won't stop them!!

So, I wanted IntelliJ to do it. Is it possible to configure IntelliJ so that it will warn (or even throw a compiling error) about calling Optional.get() without first calling Optional.isPresent()?

Answer 1

IntelliJ 2016.1 supports this out-of-the-box!

By default, calling get() without verifying with isPresent() first will issue a warning, but you can go to the "Inspections" screen and set Optiong.get() without isPresent() check to have severity "Error" if you prefer.