Re: Singleton Pattern

From:
"Karl Uppiano" <karl.uppiano@verizon.net>
Newsgroups:
comp.lang.java.programmer
Date:
Sat, 25 Nov 2006 08:38:28 GMT
Message-ID:
<8iT9h.6600$J5.767@trnddc04>
"Adi" <djanoeariza@gmail.com> wrote in message
news:1164432209.256483.89400@14g2000cws.googlegroups.com...

Dear all,

I have a question about singleton pattern. In my java user group,
someone said that this pattern should be avoided, but he didn't explain
the reason.

So I am curious here, is this statement true ?


Sometimes, I suppose.

Someone else replied that this pattern is hard to test and make other
classes tightly coupled with this Singleton class. Somehow I doubt it
but I also can find any argument for that. What I know is just because
this pattern is hard to test doesn't mean that this pattern should be
avoided right ? I use this pattern a lot of times and found it useful.

Do you have any comments ?


If your design needs a singleton, then you should use a singleton. Perhaps
your colleague was referring to some of the potential pitfalls (everything
has pitfalls) described here:
http://www.javaworld.com/javaworld/jw-04-2003/jw-0425-designpatterns.html

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