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Where do enums live?

Denise Advincula
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Joined: Jan 01, 2007
Posts: 160
Please correct me if my understanding is wrong. Enums are not objects. Enums are actually just ENUMS.

(There's a java.lang.Enum in the API. I am doubtful if they're the same though)

They can be declared inside and outside classes.

When enums are declared inside a class, and upon instantiation of that class, (1) they live on the heap. Hence (2) they're treated as class variables, or instance variables of that class.

Are (1) and (2) correct?

What happens when the enums are declared outside the class. Upon usage (or upon indirect invocation of constructors if they have) where do they live?

[ June 21, 2008: Message edited by: Denise Saulon ]
[ June 21, 2008: Message edited by: Denise Saulon ]

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Jesper de Jong
Java Cowboy
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Joined: Aug 16, 2005
Posts: 14074
    
  16

An enum is a special kind of class. The constants of the enum are instances of that special classlike object; they are on the heap, just like other objects.


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Antonio Tercero
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Joined: Jun 05, 2008
Posts: 110
Enums are a kind of special class:
-They can declare a constructor
-They can declare methods
-You can override methods

Example:


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