java.lang.annotation

  • This content focuses on providing library support for the Java programming language annotation facility.

  • It details several annotations including Documented, Inherited, Native, Repeatable, Retention, and Target, each serving specific purposes within the annotation system.

  • It outlines interfaces, enums, exceptions, and errors related to annotations, providing comprehensive information for developers using Java annotations.

  • Resources like Annotation, ElementType, RetentionPolicy, AnnotationTypeMismatchException, IncompleteAnnotationException, and AnnotationFormatError are described for a better understanding of the annotation ecosystem in Java.
Provides library support for the Java programming language annotation facility.

Annotations

Documented Indicates that annotations with a type are to be documented by javadoc and similar tools by default. 
Inherited Indicates that an annotation type is automatically inherited. 
Native Indicates that a field defining a constant value may be referenced from native code. 
Repeatable The annotation type java.lang.annotation.Repeatable is used to indicate that the annotation type whose declaration it (meta-)annotates is repeatable. 
Retention Indicates how long annotations with the annotated type are to be retained. 
Target Indicates the contexts in which an annotation type is applicable. 

Interfaces

Annotation The common interface extended by all annotation types. 

Enums

ElementType The constants of this enumerated type provide a simple classification of the syntactic locations where annotations may appear in a Java program. 
RetentionPolicy Annotation retention policy. 

Exceptions

AnnotationTypeMismatchException Thrown to indicate that a program has attempted to access an element of an annotation whose type has changed after the annotation was compiled (or serialized). 
IncompleteAnnotationException Thrown to indicate that a program has attempted to access an element of an annotation type that was added to the annotation type definition after the annotation was compiled (or serialized). 

Errors

AnnotationFormatError Thrown when the annotation parser attempts to read an annotation from a class file and determines that the annotation is malformed.