An annotation type declaration and include defaults.

 

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

@Retention(RetentionPolicy.RUNTIME)  
@interface MyAnno { 
  String str() default "Testing"; 
  int val() default 9000; 
} 
 
public class Meta3 { 
 
  // Annotate a method using the default values. 
  @MyAnno() 
  public static void myMeth() { 
    Meta3 ob = new Meta3(); 
 
    // Obtain the annotation for this method 
    // and display the values of the members. 
    try { 
      Class c = ob.getClass(); 
 
      Method m = c.getMethod("myMeth"); 
 
      MyAnno anno = m.getAnnotation(MyAnno.class); 
  
      System.out.println(anno.str() + " " + anno.val()); 
    } catch (NoSuchMethodException exc) { 
       System.out.println("Method Not Found."); 
    } 
  } 
 
  public static void main(String args[]) { 
    myMeth(); 
  } 
}

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An annotation type declaration and include defaults. : Annotation « Language Basics « Java

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