AnnotationOnTypeArgument.java

import java.lang.reflect.*;
import java.util.*;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;


public class AnnotationOnTypeArgument {

	@Target({ElementType.FIELD,ElementType.PARAMETER,ElementType.METHOD,ElementType.TYPE_USE})
	@Retention(RetentionPolicy.RUNTIME)
	public @interface Anno {

	}

	interface Nested<T> {
		
	}
	
	Toplevel<@Anno Integer> toplevel;
	
	Nested<@Anno Integer> nested;
	
	public static void main(String[] args) throws Exception {
		print(AnnotationOnTypeArgument.class.getDeclaredField("toplevel"));
		print(AnnotationOnTypeArgument.class.getDeclaredField("nested"));
	}

	private static void print(Field field) {
		AnnotatedType annotatedType = field.getAnnotatedType();
		AnnotatedParameterizedType annotatedParameterizedType = (AnnotatedParameterizedType)annotatedType;
		ParameterizedType parameterizedType = (ParameterizedType)annotatedParameterizedType.getType();
		AnnotatedType argType = annotatedParameterizedType.getAnnotatedActualTypeArguments()[0];
		System.out.printf("field %s%ntype=%s%nannotatedType=%s%nannotations=%s%ntype=%s%n%n",
				field.getName(), parameterizedType, argType, Arrays.asList(argType.getDeclaredAnnotations()), argType.getType());
	}

}

interface Toplevel<T> {
	
}