import java.lang.annotation.*;

import java.lang.reflect.Field;

@Exploit()

public class Annotationcode {

public @interface Father{

public String css() default "father";

}

@Father(css="dada")

int a;

public static void main(String[] args){

/* boolean hasAnnotation=Annotationcode.class.isAnnotationPresent(Exploit.class);//panduan shifou shiyong zhujie

if(hasAnnotation){

Exploit exploit=Annotationcode.class.getAnnotation(Exploit.class); //huo qu zhu jie duixiang

System.out.println("id:"+exploit.msg());*/

try {

Field a =Annotationcode.class.getDeclaredField("a");

a.setAccessible(true);

Father fa=a.getAnnotation(Father.class);

if(fa!=null){

System.out.println(fa.css());

}

}

catch (NoSuchFieldException e) {

e.printStackTrace();

}

}

}

@interface Father{

public String css() default "father";

}

@Target(ElementType.TYPE)

@Retention(RetentionPolicy.RUNTIME)

@interface Exploit{

public int id() default 520;

public String msg() default "Hiss";

}

@Exploit

class HelloExp{

}

@Father

class Boy{

}

class girl extends Boy{

}

@interface Persons{

Person[] value();

}

@Repeatable(Persons.class)

@interface Person {

String role();

}

@Person(role="artist")

@Person(role="coder")

@Person(role="PM")

class Chaoren{

String vule="";

}