The getAnnotations() method of java.lang.Class 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:
// Java program to demonstrate// getAnnotations() method import java.util.*;import java.lang.annotation.*; @Deprecatedpublic 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); } }} |
Output:
Class represented by myClass: class Test Annotation of myClass: [@java.lang.Deprecated()]
Example 2:
// 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())); }} |
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/Class.html#getAnnotations–
