I would like to offer some accessors to a value-container (that is a java.lang.Map under the hood). When implementing accessors like this … ‘ofNullable’ is marked with ‘unsafe null type convertion’. Why is this? The parameter ofNullable is not marked as @NonNull. Is it, because e…
Tag: nullable
Should you assert not null with the assert statement in production code? [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 2 years ago. Improve this question I’ve seen this question but have a few more questions about the…
How to return when an optional is empty?
I love that optionals are in the Java standard library now. But there is one basic problem that I keep running into that I haven’t figured out how to solve in the best way (easiest to read and understand, prettiest, shortest): How to return from a method when an optional is empty? I am looking for a gen…
Idiomatic way to create a Stream from a Nullable object
What is the best/idiomatic way of performing a null-check before generating a stream? I have a method that receives a List that might be null. So I can’t just call stream() on the value that is passed. Is there some static helper in that would give me an empty stream if a value is null? Answer I agree w…
Can’t find @Nullable inside javax.annotation.*
I want use @Nullable annotation to eliminate NullPointerExceptions. I found some tutorials on the net, I noticed that this annotation comes from the package javax.annotation.Nullable; but when I import it a compilation error is generated: cannot find symbol Answer You need to include a jar that this class exi…