Nested Enums

Little known fact that I also only just found out about: nested enum types are implicitly static in Java (see the JLS). However, it is permitted for the declaration of a nested enum type to redundantly specify the static modifier. In other words, the following two enum declarations are effectively equivalent:

public class Foo {

   public static enum Bar {
   }
}


public class Foo {

   public enum Bar {
   }
}