Check an annotation from a Field without isAnnotationPresent

I need to check if there is an annotation present at a Field, but I can't use isAnnotationPresent to check it.

public void foo(Class<?> clazz) {
    Field[] fieldReflection = clazz.getDeclaredFields();

    for (Field fieldReflect : fieldReflection){
        if (fieldReflect.isAnnotationPresent(FieldSize.class){
            //do something
        } else {
            throw new Exception();
        }
    }
}

This is how I'm doing today, there is another way to check if the Field have an annotation?