@Documented @Retention(value=RUNTIME) @Target(value=ANNOTATION_TYPE) public @interface Target
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 {
...
}
| Modifier and Type | Required Element and Description |
|---|---|
ElementType[] |
value
Returns an array of the kinds of elements an annotation type
can be applied to.
|
public abstract ElementType[] value
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