What is javax.inject.Named annotation supposed to be used for?

Question

Use @Named to differentiate between different objects of the same type bound in the same scope.

@Named("maxWaitTime")
public long maxWaitTimeMs;

@Named("minWaitTime")
public long minWaitTimeMs;

Without the @Named qualifier, the injector would not know which long to bind to which variable.

If you want to create annotations that act like @Named, use the @Qualifier annotation when creating them.
If you look at @Named, it is itself annotated with @Qualifier.