package anotation; import java.lang.annotation.Annotation; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.reflect.Field; /** * Created by max on 2/19/17. */ public class AnnotationExample { public static void main(String[] args) throws IllegalAccessException { Person person = new Person(); print(person, person.getClass()); } private static void print(Object o, Class c) throws IllegalAccessException { Field[] fields = c.getDeclaredFields(); for (Field field : fields) { Annotation[] annotations = field.getDeclaredAnnotations(); for (Annotation annotation : annotations) { if(annotation.annotationType().equals(Show.class)) { System.out.println(field.get(o)); } } } } } @Retention(RetentionPolicy.RUNTIME) @interface Show { boolean value() default true; } class Person { @Show String name = "Max"; int age = 18; }