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I want to take an existing enum and add more elements to it as follows:

enum A {a,b,c}

enum B extends A {d}

/*B is {a,b,c,d}*/

Is this possible in Java?

1 Answer

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by (46.1k points)

It's not possible in Java. Apart from anything else, d would then probably be an instance of A (given the standard idea of "extends"), but users that only knew of A wouldn't understand it - which takes the point of an enum is a well-known set of values.

If you could explain to me more about how you want to practice this, I could recommend alternative resolutions.

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