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Article #17849

Re: how to instantiate n objects during runtime?

#17849
From: yunj
Date: Thu, 10 Sep 1998 00:00
32 lines
2022 bytes
In article <35CFCCCB.42DC4D35@worldnet.att.net>,
  John Niesz <sunrunner15@worldnet.att.net> wrote:
> just store them in a Vector, using the addElement(Object myObj) function in
> the loop, and when you read the objects from the Vector, make sure you cast
> them appropriately: ((MyObj)(vec.elementAt(index)));
>
> Mariano Belinky wrote:
>
> > how can I instantiate n objects in runtime? for example, I pass and int
> > arg to a for and the loop will instantiate that "quantity" of objects.
> >
> > Mariano
>
>

I read the Visual Cafe 2.5a notes on vector.addElement and looked at examples
in books.  They give examples, such as v1.addElement("four") or v1.addElement
(new Integer(1)).  But what I really need to know is how do I add my own user
developed objects?  I get an error message:
"Exception occured during event dispatching:
java.lang.NullPointerException"

It compiles fine.  The object only holds 3 strings. Any ideas what I'm doing
wrong? Vector MyVector; CPerson MyPerson; CPerson.Name = "Jim";
MyVector.add(MyPerson);  <-- this compiles fine, but I get a runtime
exception that isn't displayed.

Thanks,
Jairo

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From: yunj@my-dejanews.com
Subject: Re: how to instantiate n objects during runtime?
Date: 1998/09/10
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