| Annotation | Defines the interface implemented by all annotations. |
| ElementType | Defines an enumeration for Java program elements. |
| RetentionPolicy | Defines an enumeration for annotation retention policies. |
| AnnotationTypeMismatchException | Indicates that an annotation type has changed since it was compiled or serialized. |
| IncompleteAnnotationException | Indicates that an element of an annotation type was accessed that was added after the type was compiled or serialized. |
| AnnotationFormatError | Indicates that an annotation in the binary representation of a class is syntactically incorrect and the annotation parser is unable to process it. |