To check if an ArrayList is empty, you can use ArrayList. isEmpty() method or first check if the ArrayList is null, and if not null, check its size using ArrayList. size() method. The size of an empty ArrayList is zero .
Read moreIs an object null?
No , null is not an object .It is a reference type and its value does not refer to any object and so there is no representation of null in memory.
Read moreHow do you check if a list is null?
Empty lists are considered False in Python, hence the bool() function would return False if the list was passed as an argument . Other methods you can use to check if a list is empty are placing it inside an if statement, using the len() methods, or comparing it with an empty list.
Read moreDoes list isEmpty () check for null?
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
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