Can Scala enumeration maps to an Integer like Java?

Question

I have an original Java enumeration class, which I can get the corresponding integer value using:

Integer blackInteger = ColorEnum.BLACK.getValue()

public enum ColorEnum {

    BLACK(0), BLUE(1), RED(2);

    private int value;

    private ColorEnum(int value) {
        this.value = value;
    }

    public int getValue() {
        return value;
    }
}

I then tried to write the enum class in Scala:

object ColorEnum extends Enumeration {
  val BLACK, BLUE, RED = Value
}

I am wondering how do I get the integer value of ColorEnum.BLACK in Scala?

Thanks a lot!

See also [this answer](http://stackoverflow.com/a/2508070/406435). — senia, Jun 06 '15 at 16:11

score 3 · Accepted Answer · edited Jun 06 '15 at 22:07

3

Use id like so:

ColorEnum.BLACK.id

Enumeration.Value in the Scaladoc.

edited Jun 06 '15 at 22:07

Arne Claassen

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answered Jun 06 '15 at 15:45

bjfletcher

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There's a comment somewhere not to use ordinal in java for logic. It's safer to add a field, since if you change the enum, you change the ordinal. In scala, you can set the id explicitly, `val x = Value(100)`. But because of the bit set impl, it's safer to have a field for big values. By coincidence, I was about to help with https://issues.scala-lang.org/browse/SI-4803 – som-snytt Jun 06 '15 at 16:26

Can Scala enumeration maps to an Integer like Java?

1 Answers1