Top Description Annotations
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Package org.springframework.lang

Common annotations with language-level semantics: nullability as well as JDK API indications. These annotations sit at the lowest level of Spring's package dependency arrangement, even lower than org.springframework.util, with no Spring-specific concepts implied.

Used descriptively within the framework codebase. Can be validated by build-time tools (e.g. FindBugs or Animal Sniffer), alternative JVM languages (e.g. Kotlin), as well as IDEs (e.g. IntelliJ IDEA or Eclipse with corresponding project setup).

Annotation Summary

Modifier and TypeAnnotation and Description
public @interface
NonNull

A common Spring annotation to declare that annotated elements cannot be null.

public @interface
NonNullApi

A common Spring annotation to declare that parameters and return values are to be considered as non-nullable by default for a given package.

public @interface
NonNullFields

A common Spring annotation to declare that fields are to be considered as non-nullable by default for a given package.

public @interface
Nullable

A common Spring annotation to declare that annotated elements can be null under certain circumstances.