Pan Bydlak Pan Bydlak - 1 year ago 128
Java Question

How to make @NotNull throw runtime exception?

Is there any framework that can throw exception if I pass null as parameter to

annotation? I don't mean static analysis but run-time checks.

If not, how to implement it?

Answer Source

Lombok @NonNull generates those boilerplate for you. Instead of annotating method with @NotNull, you annotate the parameter @NonNull instead.

import lombok.NonNull;

public class NonNullExample extends Something {
   private String name;
   public NonNullExample(@NonNull Person person) {
////   if (person == null) {
////       throw new NullPointerException("person");
////   } = person.getName();

See the many questions tagged to learn more.

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