Class getAnnotations() method in Java with Examples (original) (raw)

Last Updated : 27 Dec, 2019

The getAnnotations() method of java.lang.Class class is used to get the annotations present in this class. The method returns an array of annotations present.

Syntax:

public Annotation[] getAnnotations()

Parameter: This method does not accepts any parameter.

Return Value: This method returns an array of annotations present.

Below programs demonstrate the getAnnotations() method.

Example 1:

import java.util.*;

import java.lang.annotation.*;

@Deprecated

public class Test {

`` public Object obj;

`` public static void main(String[] args)

`` throws ClassNotFoundException

`` {

`` try {

`` Class myClass = Test. class ;

`` System.out.println(

`` "Class represented by myClass: "

`` + myClass.toString());

`` System.out.println(

`` "Annotation of myClass: "

`` + Arrays.toString(

`` myClass.getAnnotations()));

`` }

`` catch (Exception e) {

`` System.out.println(e);

`` }

`` }

}

Output:

Class represented by myClass: class Test Annotation of myClass: [@java.lang.Deprecated()]

Example 2:

import java.util.*;

import java.lang.annotation.*;

@Retention (RetentionPolicy.RUNTIME)

@interface Annotation {

`` public String key();

`` public String value();

}

@Annotation (key = "GFG" , value = "GeeksForGeeks" )

public class Test {

`` public Object obj;

`` public static void main(String[] args)

`` throws ClassNotFoundException

`` {

`` Class myClass = Test. class ;

`` System.out.println(

`` "Class represented by myClass: "

`` + myClass.toString());

`` System.out.println(

`` "Annotation of myClass: "

`` + Arrays.toString(

`` myClass.getAnnotations()));

`` }

}

Output:

Class represented by myClass: class Test Annotation of myClass: [@Annotation(key=GFG, value=GeeksForGeeks)]

Reference: https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#getAnnotations–