java.lang.reflect.AccessibleObject.isAnnotationPresent() Method Example

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Description

The java.lang.reflect.AccessibleObject.isAnnotationPresent(Class<? extends Annotation> annotationClass) method returns true if an annotation for the specified type is present on this element, else false.

Declaration

Following is the declaration for java.lang.reflect.AccessibleObject.isAnnotationPresent(Class<? extends Annotation> annotationClass) method.

public boolean isAnnotationPresent(Class<? extends Annotation>  annotationClass)

Parameters

annotationClass − the Class object corresponding to the annotation type.

Return Value

true if an annotation for the specified annotation type is present on this element, else false.

Exceptions

NullPointerException − if the given annotation class is null.

Example

The following example shows the usage of java.lang.reflect.AccessibleObject.isAnnotationPresent(Class<? extends Annotation> annotationClass) method.

Live Demo

package com.tutorialspoint;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Annotation;
import java.lang.reflect.AccessibleObject;

public class AccessibleObjectDemo {
   public static void main(String[] args) throws NoSuchMethodException, 
      SecurityException, NoSuchFieldException {
      AccessibleObject sampleMethod = SampleClass.class.getMethod("sampleMethod");
      System.out.println("sampleMethod.isAnnotationPresent: " 
         + sampleMethod.isAnnotationPresent(CustomAnnotation.class));
   }
}

@CustomAnnotation(name = "SampleClass",  value = "Sample Class Annotation")
class SampleClass {
   private String sampleField;

   @CustomAnnotation(name = "sampleMethod",  value = "Sample Method Annotation")
   public String sampleMethod(){
      return "sample";
   }

   public String getSampleField() {
      return sampleField;
   }

   public void setSampleField(String sampleField) {
      this.sampleField = sampleField;
   } 
}

@Retention(RetentionPolicy.RUNTIME)
@interface CustomAnnotation {
   public String name();
   public String value();
}

Let us compile and run the above program, this will produce the following result −

sampleMethod.isAnnotationPresent: true

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