Some points to note about enums

There are few things which could probably be improved in the coming versions of Java.

• Currently null can be passed as a method parameter or assigned where an enum is expected. A compile-time verification for null enum assignment would probably avoid all those extra null checks that we need to incorporate in our code.
• Static fields within enums cannot be accessed in its constructor. But, static methods are allowed to be invoked. The compiler enforces verification only for static fields and not methods.
• However, enum constructors are invoked before static initialization is performed and hence the static fields would not be initialized. So, if you invoke static methods from the constructor which inturn access static fields, they would all be un-initialized.