TOO SLOW list.add(element) OR choice.add(element)

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4 total messages Started by Luis Miguel Crespo Pérez Thu, 28 Jan 1999 00:00

#128

Author: Luis Miguel Crespo Pérez
Date: Thu, 28 Jan 1999 00:00

12 lines
1501 bytes

I find to slow adding strings to lists and choices, if I try:
    for (int i = 0; i < 1000; i++)
        list.add("Element " + i);
this takes for ever, and even worse, the list starts scrolling up
and down while adding elements.

This also happens to Choice components.

Is there a way to avoid it ?

If so, please send an ansawer to:
    lmc@sdsoftware.es

Re: TOO SLOW list.add(element) OR choice.add(element)

#129

Author: mY
Date: Fri, 29 Jan 1999 00:00

19 lines
1581 bytes

It's possible the there is Listener already attached to them before
you add item.  Try removing those before hand.

On Thu, 28 Jan 1999 17:35:50 +0100, Luis Miguel Crespo
=?iso-8859-1?Q?P=E9rez?= <lmc@sdsoftware.es> wrote:

>I find to slow adding strings to lists and choices, if I try:
>    for (int i = 0; i < 1000; i++)
>        list.add("Element " + i);
>this takes for ever, and even worse, the list starts scrolling up
>and down while adding elements.
>
>This also happens to Choice components.
>
>Is there a way to avoid it ?
>
>If so, please send an ansawer to:
>    lmc@sdsoftware.es
>

Re: TOO SLOW list.add(element) OR choice.add(element)

#130

Author: Bret Ewin
Date: Fri, 29 Jan 1999 00:00

20 lines
1642 bytes

How about implementing your own Model class that doesn't send update
events until you tell it to? Maybe a setNotifyListeners(boolean) method?

Bret

Luis Miguel Crespo P�rez wrote:

> I find to slow adding strings to lists and choices, if I try:
>     for (int i = 0; i < 1000; i++)
>         list.add("Element " + i);
> this takes for ever, and even worse, the list starts scrolling up
> and down while adding elements.
>
> This also happens to Choice components.
>
> Is there a way to avoid it ?
>
> If so, please send an ansawer to:
>     lmc@sdsoftware.es

Re: TOO SLOW list.add(element) OR choice.add(element)

#125

Author: Kendall Helmstetter Gelner
Date: Mon, 01 Feb 1999 00:00

20 lines
1729 bytes

Luis Miguel Crespo P�rez <lmc@sdsoftware.es> wrote:

>I find to slow adding strings to lists and choices, if I try:
>    for (int i = 0; i < 1000; i++)
>        list.add("Element " + i);
>this takes for ever, and even worse, the list starts scrolling up
>and down while adding elements.
>
>This also happens to Choice components.
>
>Is there a way to avoid it ?
>
>If so, please send an ansawer to:
>    lmc@sdsoftware.es

You should make a ListModel (there should be a DefaultListModel you can
subclass from to make the coding easier), put all of the strings you want
in it, then attach the ListModel to a List with the setModel() call.  It's
all in repaint, or listeners, or any of the other things the others have
pointed out.

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