Re: Singletons?

From:

Eric Sosman <esosman@acm-dot-org.invalid>

Newsgroups:

comp.lang.java.help

Date:

Wed, 14 Jun 2006 08:05:54 -0400

Message-ID:

<UPydnUmps4kyZhLZnZ2dnUVZ_uWdnZ2d@comcast.com>

Mark Space wrote:

Andrew McDonagh wrote:

Another question would be: What can I do instead of using Singletons?

Right. I'm already thinking that I don't need (or want) to make the
anAPI class into a singleton. First, unlike C++ where I could still
take a reference to a singleton object, I can't in Java. So allowing
object creation (really just a reference in Java) might actually be
useful for anAPI.

     Are you using the words "singleton" and/or "reference" in
some peculiar way, possibly specific to C++? In Java, you can
make as many references as you please to an object, singleton
or otherwise:

    public class Lonesome {
        private static final Lonesome thing = new Lonesome();
        private Lonesome() {}
        public static Lonesome getInstance() {
            return thing;
        }
    }

    ...

    Lonesome trail = Lonesome.getInstance();
    Lonesome cowboy = Lonesome.getInstance();
    Lonesome star = Lonesome.getInstance();
    ...

     Maybe if you'd take a step back and describe the problem you
want to solve instead of describing the techniques you're trying
to use to solve it, somebody might be able to offer better advice.

--
Eric Sosman
esosman@acm-dot-org.invalid