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Target
public
abstract
@interface
Target
implements
Annotation
| java.lang.annotation.Target |
Indicates the contexts in which an annotation type is applicable. The
declaration contexts and type contexts in which an annotation type may be
applicable are specified in JLS 9.6.4.1, and denoted in source code by enum
constants of java.lang.annotation.ElementType.
If an @Target meta-annotation is not present on an annotation type
T , then an annotation of type T may be written as a
modifier for any declaration except a type parameter declaration.
If an @Target meta-annotation is present, the compiler will enforce
the usage restrictions indicated by ElementType
enum constants, in line with JLS 9.7.4.
For example, this @Target meta-annotation indicates that the
declared type is itself a meta-annotation type. It can only be used on
annotation type declarations:
@Target(ElementType.ANNOTATION_TYPE)
public @interface MetaAnnotationType {
...
}
This @Target meta-annotation indicates that the declared type is
intended solely for use as a member type in complex annotation type
declarations. It cannot be used to annotate anything directly:
@Target({})
public @interface MemberType {
...
}
It is a compile-time error for a single ElementType constant to
appear more than once in an @Target annotation. For example, the
following @Target meta-annotation is illegal:
@Target({ElementType.FIELD, ElementType.METHOD, ElementType.FIELD})
public @interface Bogus {
...
}
Summary
Public methods | |
|---|---|
ElementType[]
|
value()
Returns an array of the kinds of elements an annotation type can be applied to. |
Inherited methods | |
|---|---|
Public methods
value
public ElementType[] value ()
Returns an array of the kinds of elements an annotation type can be applied to.
| Returns | |
|---|---|
ElementType[] |
an array of the kinds of elements an annotation type can be applied to |