isEmpty() doesn’t check if a list is null . If you are using the Spring framework you can use the CollectionUtils class to check if a list is empty or not.22 Mar 2016
Read moreIS null equals object safe?
You should always use Objects. equals() as it is null-safe and performs better.
Read moreCan you use == for null?
7. == and != The comparison and not equal to operators are allowed with null in Java . This can made useful in checking of null with objects in java.
Read moreCan you call equals on null Java?
It’s entirely possible for two distinct object instances to be “equal” according to their contract. And then there’s the minor detail that since equals is a method, if you try to invoke it on a null reference, you’ll get a NullPointerException .21 Ara 2010
Read moreCan you use == for null?
7. == and != The comparison and not equal to operators are allowed with null in Java . This can made useful in checking of null with objects in java.
Read moreHow do I check if an integer is null?
If you want an integer to be able to be null, you need to use Integer instead of int . @sharonHwk “person == null” should be the better option. If person is null, it won’t have a “equal” method, then “person. equals(null)” throws.
Read moreWhat is the difference between Optional and null check in Java 8?
In a nutshell, the Optional class includes methods to explicitly deal with the cases where a value is present or absent. However, the advantage compared to null references is that the Optional class forces you to think about the case when the value is not present .
Read more