Marker Annotations : Annotations Types « Language « Java Tutorial

  1. Marker Annotations are used to mark a declaration.
  2. A marker annotation is a special kind of annotation.
  3. A marker annotation contains no members.
  4. Using isAnnotationPresent( ) to determine if the marker is present.
import java.lang.annotation.Annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;

@interface MyAnnotation {

public class MainClass {
  // Annotate a method.
  public static void myMethod() {

  public static void main(String[] arg) {
    try {
      MainClass ob = new MainClass();

      Method m = ob.getClass( ).getMethod("myMethod");
      Annotation[] annos = m.getAnnotations();

      System.out.println("All annotations for myMeth:");
      for(Annotation a : annos)

    } catch (Exception exc) {
All annotations for myMeth:

1.13.Annotations Types
1.13.1.Annotations and Annotation Types
1.13.2.The Annotation Interface
1.13.3.Using Default Values
1.13.4.Marker Annotations
1.13.5.Single-Member Annotations
1.13.6.Creates and uses a single-member annotation
1.13.7.The single-value syntax
1.13.8.Some Restrictions
1.13.9.A marker annotation