Null check error message as "is null" or "was null"
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by Timo Westkämper
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Published on 2010-06-11T11:31:57Z
Indexed on
2010/06/11
12:12 UTC
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java
When doing null checks in Java code, and you throw IllegalArgumentExceptions for null values, what kind of message template do you use?
We tend to use something like this
public User getUser(String username){
if (username == null){
throw new IllegalArgumentException("username is null");
}
// ...
}
What is better : "is null" or "was null", and why?
For me "is null" feels more natural.
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