Java里面有四种元注解，@Inherited便是其中之一，其作用在java文档中写的很清楚了：

* Indicates that an annotation type is automatically inherited.  If
 * an Inherited meta-annotation is present on an annotation type
 * declaration, and the user queries the annotation type on a class
 * declaration, and the class declaration has no annotation for this type,
 * then the class's superclass will automatically be queried for the
 * annotation type.  This process will be repeated until an annotation for this
 * type is found, or the top of the class hierarchy (Object)
 * is reached.  If no superclass has an annotation for this type, then
 * the query will indicate that the class in question has no such annotation.
 *
 * <p>Note that this meta-annotation type has no effect if the annotated
 * type is used to annotate anything other than a class.  Note also
 * that this meta-annotation only causes annotations to be inherited
 * from superclasses; annotations on implemented interfaces have no
 * effect.

表明一个注解是可以被继承的。如果一个注解A被@inherited标注，那么当调用反射api查询一个类是否被A标注不仅仅会看这个类有没有A注解，同时会看A的父类是否有A注解，直到找到A注解或者到达了顶层父类。

这个特性可以理解为子类会继承父类的被@Inherited修饰过的注解。

另外这个效果仅仅作用在类上，对接口无效。