Clever Geek Handbook

Purpose of Objects.isNull (...) / Objects.nonNull (...)

What is the purpose

Objects.isNull(x)

if we can just write

x == null

?

The same for

Objects.nonNull(...)

and

x != null
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2 answers


From JavaDoc method :



API Note: This method exists for use as Predicate

,filter(Objects::isNull)

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Apart from its obvious use in the functional world. It can also be used in your normal code instead of ==

.

Many programmers (myself included) believe that they are ( x == null

or x != null

) not object oriented , and therefore it makes sense to use the object oriented version.

Java doc objects:



This class consists of static utility methods for working with objects. These utilities include null and invalid methods for calculating the hash code of an object, returning a string for the object, and comparing two objects.

I personally prefer the method version and have been using it for the last couple of years :)

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