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Java Class class isAnnotation() method with example

Class class isAnnotation() method: Here, we are going to learn about the isAnnotation() method of Class class with its syntax and example.
Submitted by Preeti Jain, on November 01, 2019

Class class isAnnotation() method

  • isAnnotation() method is available in java.lang package.
  • isAnnotation() method is used to check whether this Class object represents the annotation type or not.
  • isAnnotation() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • isAnnotation() method does not throw an exception at the time of returning the Annotation type.

Syntax:

    public boolean isAnnotation();

Parameter(s):

  • It does not accept any parameter.

Return value:

The return type of this method is boolean, it returns a boolean value based on the following cases,

  • It returns true, when this Class object denotes an annotation type.
  • It returns false, when this Class object does not denote an annotation type.

Example:

// Java program to demonstrate the example 
// of boolean isAnnotation() method of Class 

import java.security.*;
public class NonAnnoClass {
    public static void main(String[] args) throws Exception {

        Class ann1 = Identity.class;
        Class ann2 = Deprecated.class;

        // We are checking Annotation type of Deprecated class
        // by using the method isAnnotation()
        boolean b = ann2.isAnnotation();
        System.out.println("Is Deprecated an Annotation type" + " " + b);

        // We are checking Annotation type of Identity class
        // by using the method isAnnotation()
        if (ann1.isAnnotation()) {
            System.out.print(ann1.getSimpleName() + "is an Annotation type.");
            System.out.println(ann1.isAnnotation());
        } else {
            System.out.print(ann1.getSimpleName() + " " + "is an Annotation type" + " ");
            System.out.println(ann1.isAnnotation());
        }
    }
}

Output

Is Deprecated an Annotation type true
Identity is an Annotation type false





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