Package getAnnotations() method in Java with Examples

The getAnnotations() method of java.lang.Package 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:

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// Java program to demonstrate
// getAnnotations() 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 annotation
            // using getAnnotations() method
            System.out.println(
                "Annotation of myClass: "
                + Arrays.toString(
                      myClass.getAnnotations()));
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

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Output:

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

Example 2:

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// Java program to demonstrate
// getAnnotations() method
  
import java.util.*;
import java.lang.annotation.*;
  
// create a custom Annotation
@Retention(RetentionPolicy.RUNTIME)
@interface Annotation {
  
    // This annotation has two attributes.
    public String key();
  
    public String value();
}
  
// call Annotation for method
// and pass values for annotation
@Annotation(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 annotation
        // using getAnnotations() method
        System.out.println(
            "Annotation of myClass: "
            + Arrays.toString(
                  myClass.getAnnotations()));
    }
}

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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/Package.html#getAnnotations–

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