@NonNull annotations on definitions- java 8

Question

How to use @NonNull annotations on List items.

let consider, if i want to force A non-null list of Strings

This is how we can declare that : @NonNull List<String>

what if we want to force, A list of non-null Strings.

How we can do that ?

Answer 1

@NonNull Annotation are from the The Checker Framework.

The Framework provides a number of Annotations that could benefit developers to write clean code.

@NonNull Annotation – The compiler can determine cases where a code path might receive a null value.

Java 8 Annotation Improvements :

Prior to java 8 , annotations were only allowed on definitions.

Java SE 8 allows type annotations anywhere that a type is used.

A list of non-null Strings can be difine as List<@NonNull String>

Reference : Section 2.1