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Field getAnnotatedType() method in Java With Examples
  • Last Updated : 17 Sep, 2019

The getAnnotatedType() method of java.lang.reflect.Field is used to return an annonatedType object that represents the use of a type to specify the declared type of the field. Every Field of the class is declared by some AnnotatedType.AnnotatedType represents the potentially annotated use of any type including an array type, a parameterized type, a type variable, or a wildcard type currently running in Java Virtual Machine. The returned AnnotatedType instance can be an implementation of AnnotatedType itself or an implementation of one of its sub-interfaces: AnnotatedArrayType, AnnotatedParameterizedType, AnnotatedTypeVariable, AnnotatedWildcardType.

Syntax:

public AnnotatedType getAnnotatedType()

Parameters: This method accepts accepts nothing.

Return: This method returns an object representing the declared type of the field represented by this Field.

Below programs illustrate getAnnotatedType() method:
Program 1:






// Java program to illustrate
// getAnnotatedType() method
  
import java.lang.reflect.AnnotatedType;
import java.lang.reflect.Field;
import java.util.Arrays;
  
public class GFG {
  
    private int number;
  
    public static void main(String[] args)
        throws NoSuchFieldException
    {
  
        // get Field object
        Field field
            = GFG.class
                  .getDeclaredField("number");
  
        // apply getAnnotatedType() method
        AnnotatedType annotatedType
            = field.getAnnotatedType();
  
        // print the results
        System.out.println(
            "Type: "
            + annotatedType
                  .getType()
                  .getTypeName());
        System.out.println(
            "Annotations: "
            + Arrays
                  .toString(
                      annotatedType
                          .getAnnotations()));
    }
}
Output:
Type: int
Annotations: []

Program 2:




// Java Program to illustrate
// getAnnotatedType() method
  
import java.lang.annotation.*;
import java.lang.reflect.*;
import java.util.Arrays;
  
public class GFG {
  
    private int @SpecialNumber[] number;
  
    public static void main(String[] args)
        throws NoSuchFieldException
    {
        // get Field object
        Field field
            = GFG.class
                  .getDeclaredField("number");
  
        // apply getAnnotatedType() method
        AnnotatedType annotatedType
            = field.getAnnotatedType();
  
        // print the results
        System.out.println(
            "Type: "
            + annotatedType
                  .getType()
                  .getTypeName());
        System.out.println(
            "Annotations: "
            + Arrays
                  .toString(
                      annotatedType
                          .getAnnotations()));
        System.out.println(
            "Declared Annotations: "
            + Arrays
                  .toString(
                      annotatedType
                          .getDeclaredAnnotations()));
    }
  
    @Target({ ElementType.TYPE_USE })
    @Retention(RetentionPolicy.RUNTIME)
    private @interface SpecialNumber {
    }
}
Output:
Type: int[]
Annotations: [@GFG$SpecialNumber()]
Declared Annotations: [@GFG$SpecialNumber()]

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

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