Checking if a collection is empty in Java: which is the best method?

Question

I have two ways of checking if a List is empty or not

if (CollectionUtils.isNotEmpty(listName)) 

and

if (listName != null          


        

Answer 1

isEmpty()

      Returns true if this list contains no elements.

http://docs.oracle.com/javase/1.4.2/docs/api/java/util/List.html