How to use trim and avoid NPE by using collections.sort?

user_11000298 0
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There is a Class Role, having data member as String roleName. I have to sort a list of Role. While sorting I need to check NPE and trim roleName also. So I used

roleList.sort(Comparator.comparing(Role::getRoleName, 
    Comparator.nullsLast(Comparator.naturalOrder())));

I can suppress the null pointer exception but can't use trim.

roleList.sort( (x, y) -> x.getRole().trim().compareTo(y.getRole().trim()));

Using this I can't avoid NPE.

java-8 comparator sorting lambda java
1 Answers

How about this:

roleList.sort(Comparator.comparing(Role::getRoleName,
    Comparator.nullsLast(Comparator.comparing(String::trim))));
user_7063170
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