Re: Enum Idiom Question

From:
=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>
Newsgroups:
comp.lang.java.programmer
Date:
Fri, 28 May 2010 21:34:49 -0400
Message-ID:
<4c006f2d$0$278$14726298@news.sunsite.dk>
On 28-05-2010 20:43, Rhino wrote:

"Arne Vajh?j"<arne@vajhoej.dk> wrote in message
news:4c005ae9$0$281$14726298@news.sunsite.dk...

On 28-05-2010 19:02, Rhino wrote:

It's the if statement that concerns me here. This code works fine (I can
test for CompletionStatus.NO_ERROR by simply changlng the right side of
the
if) but it doesn't look right. It reminds me of mistakes I made when I
was
new to Java comparing Strings to each other via the == operator to see if
they had the same VALUE but discovering that == doesn't determine
equality
of value.

Is there a better way to do this if statement? If so, what is it?


I would compare with CompletionStatus.NO_ERROR, because it is
a lot more likely that you will have more than one error status
than more than one no error status.


Okay, that's fair. But am I writing the comparison correctly? That ==
operator looks wrong somehow, even if it works. I'm concerned that this
might be like comparing two Strings with the == operator; sometimes it will
show equality and make you think it is confirming equality of value between
the two strings but it is not; you have to use equals() to compare String
values. But I'm not sure what the equivalent is for an enum.


== on enums are fine.

Object identity is exactly what is needed.

Arne

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