Java.lang.Package.getAnnotations() Method

Description

The java.lang.Package.getAnnotations() method returns all annotations present on this element. (Returns an array of length zero if this element has no annotations.) The caller of this method is free to modify the returned array; it will have no effect on the arrays returned to other callers.

Declaration

Following is the declaration for java.lang.Package.getAnnotations() method

public Annotation[] getAnnotations()

Parameters

• NA

Return Value

This method returns all annotations present on this element

Exception

• NA

Example

The following example shows the usage of lang.Object.getAnnotations() method.

package com.tutorialspoint;

import java.lang.annotation.Annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;

// declare a new annotation
@Retention(RetentionPolicy.RUNTIME)
@interface Demo {

   String str();

   int val();
}

public class PackageDemo {

   // set values for the annotation
   @Demo(str = "Demo Annotation", val = 100)
   // a method to call in the main
   public static void example() {
      PackageDemo ob = new PackageDemo();

      try {
         Class c = ob.getClass();

         // get the method example
         Method m = c.getMethod("example");

         // get the annotations
         Annotation[] annotation = m.getAnnotations();

         // print the annotation
         for (int i = 0; i < annotation.length; i++) {
            System.out.println(annotation[i]);
         }
      } catch (NoSuchMethodException exc) {
         exc.printStackTrace();
      }
   }

   public static void main(String args[]) {
      example();
   }
}

Let us compile and run the above program, this will produce the following result:

@com.tutorialspoint.Demo(str=Demo Annotation, val=100)