gistfile1.java

public @interface EventListener {
    String value() default "";
}

public class AnnotationClient {
    @EventListener(AnnotationDispatcher.EVENT_ADD)
    public void onAdd(AnnotationDispatcher.Event event) {
        System.out.println("onAdd");
    }

    @EventListener(AnnotationDispatcher.EVENT_REMOVE)
    public void onRemove(AnnotationDispatcher.Event event) {
        System.out.println("onRemove");
    }
}

public class AnnotationDispatcher {
    public static final String EVENT_ADD = "event_add";
    public static final String EVENT_REMOVE = "event_remove";

    public class Event {
        int data;
    }
}