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:
// 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);
}
}
} |
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/Package.html#getAnnotations–