public abstract @interface Target
implements Annotation
| java.lang.annotation.Target |
指示注释类型适用的程序元素的种类。 如果注释类型声明中不存在目标元注释，则可以在任何程序元素上使用声明的类型。 如果存在这样的元注释，编译器将执行指定的使用限制。 例如，这个元注释表明声明的类型本身就是一个元注释类型。 它只能用于注释类型声明：
Android开发手册 @Target(ElementType.ANNOTATION_TYPE)
public @interface MetaAnnotationType {
...
}
This 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 a Target annotation. For example, the following meta-annotation is illegal:
@Target({ElementType.FIELD, ElementType.METHOD, ElementType.FIELD})
public @interface Bogus {
...
}
继承方法(Inherited methods) |
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|---|---|
 From interface java.lang.annotation.Annotation
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