Java Class getAnnotations() Method

The getAnnotations() method of java Class class returns annotations that are present on this element. If there are no annotations present on this element, then it returns an array of length 0. The caller of this method can modify the returned array.

Syntax

Parameter

No parameter is passed.

Returns

annotations present on this element

Throws

Does not throw an exception.

Example 1

import java.lang.annotation.Annotation;
public class ClassgetAnnotationsExample1  {
   public static void main(String []args) {

      ClassgetAnnotationsExample1  clsobj = new ClassgetAnnotationsExample1();
      Class cls = clsobj.getClass();

      Annotation[] a = cls.getAnnotations();
      if(a.length != 0) {
         for(Annotation val : a) {
            System.out.println(val.toString()); //print  annotation value.
         }
      } 
else {
         System.out.println("Annotations not set");
      }
   }
}

Test it Now

Output:

Annotations not set

Example 2

import java.lang.*;  //import statements...
import java.lang.annotation.Annotation;
import java.lang.annotation.Retention;  // import  Retention of annotation class
import java.lang.annotation.RetentionPolicy; // import  RetentionPolicy of annotation class
import java.lang.reflect.Method;


@Retention(RetentionPolicy.RUNTIME)
@interface Demo3 {
   String str();
   int val();
}

public class ClassgetAnnotationsExample2 {

   @Demo3(str = "Demo Annotation", val = 100)
  
   public static void sample() {
      ClassgetAnnotationsExample2 obj = new ClassgetAnnotationsExample2();

      try {
         Class c = obj.getClass();

         Method m = c.getMethod("sample");

         Annotation[] annotation = m.getAnnotations();

         for (int i = 0; i < annotation.length; i++) {
            System.out.println(annotation[i]);
         }
      } catch (NoSuchMethodException exc) {
         exc.printStackTrace();
      }
   }
   public static void main(String args[]) {
      sample();
   }
}

Test it Now

Output:

@Class.Demo3(str=Demo Annotation, val=100)

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