Converting between different enums?

[qazmlp1209]

enum firstEnum
{
ONE, TWO, THREE
}

enum secondEnum
{
ONE, TWO, THREE
}


public static void main( String args[] )
{
firstEnum firstEnumVal = firstEnum.ONE ;
secondEnum secondEnumVal = (secondEnum) firstEnumVal ;//Error is
reported here.
}

As you can see above, the integer values of the constants of both the
enums are assumed to be same(coincidentally the name also in the above
example). In that case, how exactly I can convert from one enum type to
another?

 

[Ian Pilcher]

As you can see above, the integer values of the constants of both the
enums are assumed to be same(coincidentally the name also in the above
example). In that case, how exactly I can convert from one enum type to
another?

You can use toString and valueOf. A better approach is to add a method
to one of both enum types which converts to the other.

Since the whole point of using enums is to create distinct types,
however, I can't see a good reason to be doing this.

 

[Roedy Green]

As you can see above, the integer values of the constants of both the
enums are assumed to be same(coincidentally the name also in the above
example). In that case, how exactly I can convert from one enum type to
another?

convert from enum to ordinal and from ordinal back to enum. See
http://mindprod.com/jgloss/enum.html

 

[Kenneth P. Turvey]

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On Mon, 13 Mar 2006 07:36:36 -0800, qazmlp1209 wrote:

[Snip]

public static void main( String args[] )
{
firstEnum firstEnumVal = firstEnum.ONE ;
secondEnum secondEnumVal = (secondEnum) firstEnumVal ;//Error is
reported here.
}

As you can see above, the integer values of the constants of both the
enums are assumed to be same(coincidentally the name also in the above
example). In that case, how exactly I can convert from one enum type to
another?

In Java, enums aren't the same as integers. The value firstEnum.ONE has
no relationship to the value secondEnum.ONE unless you write the code to
make them related.

- --
Kenneth P. Turvey <[email protected]>

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Yahoo IM: kpturvey2
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