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Field getDeclaredAnnotations() method in Java With Examples

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  • Last Updated : 30 May, 2022

The getDeclaredAnnotations() method of java.lang.reflect.Field is used to return annotations that are directly present on this Field object and ignores inherited annotations. If there are no annotations directly present on this element, the return value is an empty array. The caller can modify the returned array as method sent a copy of the actual object; it will have no effect on the arrays returned to other callers. Syntax:

public Annotation[] getDeclaredAnnotations()

Parameters: This method accepts nothing. Return: This method returns annotations directly present on this element. Below programs illustrate getDeclaredAnnotations() method: Program 1: 

Java




// Java program to illustrate
// getDeclaredAnnotations() method
 
import java.lang.annotation.*;
import java.lang.reflect.Field;
import java.util.Arrays;
 
public class GFG {
 
    // initialize field with  annotation
    private int @SpecialNumber[] number;
 
    public static void main(String[] args)
        throws NoSuchFieldException
    {
        // get Field object
        Field field
            = GFG.class.getDeclaredField("number");
 
        // apply getAnnotatedType() method
        Annotation[] annotations
            = field.getDeclaredAnnotations();
 
        // print the results
        System.out.println(
            Arrays
                .toString(annotations));
    }
 
    @Target({ ElementType.TYPE_USE })
    @Retention(RetentionPolicy.RUNTIME)
    private @interface SpecialNumber {
    }
}

Output:

[]

Program 2: 

Java




// Java program to illustrate
// getDeclaredAnnotations() method
 
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.Arrays;
 
public class GFG {
 
    // initialize field with  annotation
    @Deprecated
    private String string
        = " Welcome to GeeksForGeeks";
 
    public static void main(String[] args)
        throws NoSuchFieldException
    {
 
        // create Field object
        Field field
            = GFG.class
                  .getDeclaredField("string");
 
        // apply getAnnotation()
        Annotation[] annotations
            = field.getDeclaredAnnotations();
 
        // print results
        System.out.println(
            Arrays
                .toString(annotations));
    }
}

Output:

[@java.lang.Deprecated()]

References: https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html#getDeclaredAnnotations–


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