Why would you want to instantiate a new object for every single pass through
the record set?
Cheers!
Mark
----- Original Message -----
From: "Sushil Singh" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, June 13, 2001 6:38 PM
Subject: Re: Basic Object Reference Question
> Hi All:
>
> Thanks for all your comments.
>
> Another better example is:
> First Senario
> =========
> Advertisement advertisement = null;
> Vector advVector = new Vector();
> while (rs.next())
> {
> advertisement = new Advertisement();
> advertisement.setAdvertisementID (id);
> advertisement.setAdvertisementText(rs.getString(AD_TEXT));
> advVector.add(advertisement);
> }
> Secound Senario
> =========
> Advertisement advertisement = new Advertisement();
> Vector advVector = new Vector();
> while (rs.next())
> {
> advertisement = null;
> advertisement.setAdvertisementID (id);
> advertisement.setAdvertisementText(rs.getString(AD_TEXT));
> advVector.add(advertisement);
> }
>
> Which one is better? In first case, I am creating instance of
Advertistemnet
> object in a loop, but in secound example its outside the loop.
>
> Awaiting feedback.
>
> Thanks
>
> Sushil
>
>
> Jason Kilgrow wrote:
>
> > It depends on whether or not you are planning to use catID for something
else.
> > If your concern is that a new string object will be made in the while
loop,
> > don't worry about it. That's going to happen either way. I think the
issue is
> > going to come down to reusing catID. If you aren't going to reuse it
(you
> > aren't in your examples), then I say go with the first snippet. Because
whether
> > you are going to make a new string object either way.
> >
> > --- Sushil Singh <[EMAIL PROTECTED]> wrote:
> > > Hi,
> > >
> > > I am having a basic object reference question. Consider the following
> > > code snippet:
> > > while (rootRs.next())
> > > {
> > >
> > > categories.addElement(getCategory(rootRs.getString("cat_id")));
> > > }
> > >
> > > Another code snippet:
> > > String catID = "";
> > > while (rootRs.next())
> > > {
> > > catID = rootRs.getString("cat_id");
> > > categories.addElement(getCategory(catID));
> > > }
> > >
> > > Now my question is which one is better? When we say
> > >
> > > categories.addElement(getCategory(rootRs.getString("cat_id")));
> > >
> > > then we are getting a reference to the resultset string object or its
> > > new object. If its a new String object, then the while loop will be
> > > creating n no of objects throughout the loop!!!
> >
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