介绍
- java.lang.annotation.Inherited
- 声明
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.ANNOTATION_TYPE)
public @interface Inherited
- 元注解
- 标记注解
- 指明当这个注解应用于一个类的时候，能够自动被它的子类继承
代码示例
@Inherited
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface Persistent {
}
@Persistent
public class Employee {
}
public class Manager extends Employee{
}
public class Main {
public static void main(String[] args) {
Class<Manager> managerClass = Manager.class;
Annotation[] annotations = managerClass.getAnnotations();
System.out.println(Arrays.toString(annotations)); // [@v2ch08.persist.Persistent()]
Annotation[] declaredAnnotations = managerClass.getDeclaredAnnotations();
System.out.println(Arrays.toString(declaredAnnotations)); // []
Class<Employee> employeeClass = Employee.class;
System.out.println(Arrays.toString(employeeClass.getAnnotations())); // [@v2ch08.persist.Persistent()]
System.out.println(Arrays.toString(employeeClass.getDeclaredAnnotations())); // [@v2ch08.persist.Persistent()]
}
}