A marker annotation. : Annotation « Language Basics « Java

A marker annotation.

 

import java.lang.annotation.*; 
import java.lang.reflect.*; 
 

@Retention(RetentionPolicy.RUNTIME)  
@interface MyMarker { } 
 
public class Marker { 
 
  // Annotate a method using a marker. 
  // Notice that no ( ) is needed. 
  @MyMarker 
  public static void myMeth() { 
    Marker ob = new Marker(); 
 
    try { 
      Method m = ob.getClass().getMethod("myMeth"); 
 
      // Determine if the annotation is present. 
      if(m.isAnnotationPresent(MyMarker.class)) 
        System.out.println("MyMarker is present.");  
 
    } catch (NoSuchMethodException exc) { 
       System.out.println("Method Not Found."); 
    } 
  } 
 
  public static void main(String args[]) { 
    myMeth(); 
  } 
}

1.	Simple annotation
2.	Annotation Viewer
3.	Annotation Demo
4.	An annotation type declaration.
5.	An annotation type declaration 2.
6.	Show all annotations for a class and a method.
7.	An annotation type declaration and include defaults.
8.	A single member annotation.
9.	Java Annotation: Deprecated and hierarchy
10.	Java Annotation: Annotation and Reflection
11.	Java annotation: Super Sub Tester
12.	Java Annotation Tester
13.	Override Annotation Tester
14.	Insert an annotation to suppress warning
15.	Suppress warning in ANT script
16.	How do I mark method as deprecated?
17.	What is SuppressWarnings annotation?
18.	Use Override annotation
19.	SuppressWarnings Annotation Tester

A marker annotation. : Annotation « Language Basics « Java

Related examples in the same category