Question

I’m trying to use Java annotations, but can’t seem to get my code to recognize that one exists. What am I doing wrong?

  import java.lang.reflect.*;   import java.lang.annotation.*;    @interface MyAnnotation{}     public class FooTest   {      @MyAnnotation     public void doFoo()     {            }      public static void main(String[] args) throws Exception     {                        Method method = FooTest.class.getMethod( 'doFoo' );          Annotation[] annotations = method.getAnnotations();         for( Annotation annotation : method.getAnnotations() )             System.out.println( 'Annotation: ' + annotation  );      }   } 

Answer 1

You need to specify the annotation as being a Runtime annotation using the @Retention annotation on the annotation interface.

i.e.

@Retention(RetentionPolicy.RUNTIME) @interface MyAnnotation{}