CODEWITHSUNDEEP
javaspringspring-boot
michealAtmi
michealAtmi

Reputation: 1042

Spring @Value NullPointerException

I have an Integer autowired in constructor like that:

@Value("${application.someNumber:0}") Integer number)

And there is NullPointerException if nmber is null in configuration. How to write this expression so that if it is null then it would be set to 0 ? Then I would throw my own validation expetion somewhere else.. ?

Upvotes: 0

Views: 713

Answers (2)

zlaval
zlaval

Reputation: 2027

If you want to use @Value annotation in the constructor, you must annotate the constructor itself with @Autowired. Also the class must be a spring managed bean (component, service...)

Upvotes: 1

Maurice
Maurice

Reputation: 7371

First you should remove the ) at the end. As for your question. You can simply assign 0 to number like so:

Integer number = 0;

When the injected value is null number will keep the original value of 0, if it is not null it will get the injected value

Upvotes: 0

Related Questions