Don’t make the method static. The issue is that when you invoke getClass() you are calling the method in the super class – static methods are not inherited. In addition, you are basically name-shadowing Object.getClass(), which is confusing.
If you need to log the classname within the superclass, use
return this.getClass().getName();
This will return “Entity” when you have an Entity instance, “User” when you have a User instance, etc.