Source Code : Show all annotations for a class and a method.

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Show all annotations for a class and a method.

 

import java.lang.annotation.*; 
import java.lang.reflect.*; 
 
@Retention(RetentionPolicy.RUNTIME)  
@interface MyAnno { 
  String str(); 
  int val(); 
} 
 
@Retention(RetentionPolicy.RUNTIME)  
@interface What { 
  String description(); 
} 
 
@What(description = "An annotation test class") 
@MyAnno(str = "Meta2", val = 99) 
public class Meta2 { 
 
  @What(description = "An annotation test method") 
  @MyAnno(str = "Testing", val = 100) 
  public static void myMeth() { 
    Meta2 ob = new Meta2(); 
 
    try { 
      Annotation annos[] = ob.getClass().getAnnotations(); 
 
      // Display all annotations for Meta2. 
      System.out.println("All annotations for Meta2:"); 
      for(Annotation a : annos) 
        System.out.println(a); 
 
      System.out.println(); 
 
      // Display all annotations for myMeth. 
      Method m = ob.getClass( ).getMethod("myMeth"); 
      annos = m.getAnnotations();  
 
      System.out.println("All annotations for myMeth:"); 
      for(Annotation a : annos) 
        System.out.println(a); 
 
    } catch (NoSuchMethodException exc) { 
       System.out.println("Method Not Found."); 
    } 
  } 
 
  public static void main(String args[]) { 
    myMeth(); 
  } 
}
           
         
  

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