Package getDeclaredAnnotations() method in Java with Examples

Last Updated : 03 Jan, 2020

The getDeclaredAnnotations() method of java.lang.Package class is used to get the declared annotations present in this class. The method returns an array of declared annotations present. Syntax:

public DeclaredAnnotation[] getDeclaredAnnotations()

Parameter: This method does not accepts any parameter. Return Value: This method returns an array of declared annotations present. Below programs demonstrate the getDeclaredAnnotations() method. Example 1:

Java

// Java program to demonstrate
// getDeclaredAnnotations() method

import java.util.*;
import java.lang.annotation.*;

@Deprecated
public class Test {

    public Object obj;

    public static void main(String[] args)
        throws ClassNotFoundException
    {
        try {
            // returns the Class object for this class
            Class myClass = Test.class;

            System.out.println(
                "Class represented by myClass: "
                + myClass.toString());

            // Get the declared annotation
            // using getDeclaredAnnotations() method
            System.out.println(
                "DeclaredAnnotation of myClass: "
                + Arrays.toString(
                      myClass.getDeclaredAnnotations()));
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

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

Example 2:

Java

// Java program to demonstrate
// getDeclaredAnnotations() method

import java.util.*;
import java.lang.annotation.*;

// create a custom DeclaredAnnotation
@Retention(RetentionPolicy.RUNTIME)
@interface DeclaredAnnotation {

    // This declared annotation has two attributes.
    public String key();

    public String value();
}

// call DeclaredAnnotation for method
// and pass values for declared annotation
@DeclaredAnnotation(key = "GFG", value = "GeeksForGeeks")
public class Test {

    public Object obj;

    public static void main(String[] args)
        throws ClassNotFoundException
    {

        // returns the Class object for this class
        Class myClass = Test.class;

        System.out.println(
            "Class represented by myClass: "
            + myClass.toString());

        // Get the declared annotation
        // using getDeclaredAnnotations() method
        System.out.println(
            "DeclaredAnnotation of myClass: "
            + Arrays.toString(
                  myClass.getDeclaredAnnotations()));
    }
}