The type org.eclipse.jdt.annotation.NonNull cannot be resolved. It is indirectly referenced from required .class files

Error description is provided in Stephan Herrmann's comment. There is open Eclipse issue to make this issue more user friendly.

Solution is to include following dependency:

<dependency>
    <groupId>org.eclipse.jdt</groupId>
    <artifactId>org.eclipse.jdt.annotation</artifactId>
    <version>2.0.0</version>
</dependency>

Eclipse has a feature called annotation-based null analysis, which provides compile-time checks using annotations (e.g. @NonNull or @Nullable). You get this error when annotations are missing in the classpath.

If you don't plan to use the annotation-based null analysis feature, you can just disable it in Eclipse.

Open the global or project settings and go to Java > Compiler > Warnings. In the Null analysis category, uncheck Enable annotation-based null analysis. Then rebuild the workspace and those errors won't show again.

I have solved it by changing the "Use default annotation for null specifications"

I have enter the both class names:

javax.annotation.Nonnull
javax.annotation.Nullable