Source Code : A single member annotation.

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A single member annotation.

 

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

@Retention(RetentionPolicy.RUNTIME)  
@interface MySingle { 
  int value(); // this variable name must be value 
} 
 
public class Single { 
 
  // Annotate a method using a marker. 
  @MySingle(100) 
  public static void myMeth() { 
    Single ob = new Single(); 
 
    try { 
      Method m = ob.getClass().getMethod("myMeth"); 
 
      MySingle anno = m.getAnnotation(MySingle.class); 
 
      System.out.println(anno.value()); // displays 100 
 
    } catch (NoSuchMethodException exc) { 
       System.out.println("Method Not Found."); 
    } 
  } 
 
  public static void main(String args[]) { 
    myMeth(); 
  } 
}
           
         
  

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