ENUMS

• Enum when defined in the java file (outer version):
  can be only: public, default or strictfp
  cannot be: static, final, private, protected and abstract
• Enum defined within other class (inner version):
  can be: public, protected, default, private, strictfp and static!!!
  cannot be final, abstract
• Inner enums are by default static!
  
  class A {
      private enum E {}
  }
  
  is the same as:
  
  class A {
     private static enum E{}
  }
  
  
• Enums cannot be defined inside methods (there is no inner local method enum  like e.g. inner local method class, by the way you cannot declare interfaces within method too)

-----------------------------------------------------------------------------------------------------------

enum ENUM {XX};

System.out.println("XX" == ENUM.XX.name());   //prints true!