🚀 go-pugleaf

if you look at the source code for JTree you'll see why you're getting this;
this is what you get when you use the JTree empty constructor;
don't ask why they did it this way; maybe it was a demo thing
that never got cleaned up; maybe they left it in because somebody
thought it was cute; if they had to have something in there i don't
know why they just didn't put in a dummy root node but there
it is


janc2000@deja.com wrote:

> Hi,
>
> I've created a JFrame based window which contains a JTree object (I'm using
> JBuilder 4).
> To my big surpirse this JTree has a root node with 3 subnodes named
> "colors", "sports" and "food",
> although I have not added any code to populate the three.
> I've done a scan of all my sources on this names and could not find any of
> them.
>
> Anybody knows what is going on?
>
> Jan

On Fri, 17 Nov 2000, janc2000@deja.com wrote:

> Hi,
> 
> I've created a JFrame based window which contains a JTree object
> (I'm using JBuilder 4).  To my big surpirse this JTree has a root
> node with 3 subnodes named "colors", "sports" and "food", although I
> have not added any code to populate the three.  I've done a scan of
> all my sources on this names and could not find any of them.
> 
> Anybody knows what is going on?

This is the default content of JTree. Usually, you give a new root
node to the constructor of the tree or set it later using
setRoot(). If you don't the JTree will have the content you
discribed. This is very practical when you draft GUIs because you
don't have to populate the tree to see that it is a tree.


-- 
Raffael Herzog
herzog@raffael.ch

May the penguin be with you!

jet a �crit :
> 
> if you look at the source code for JTree you'll see why you're getting this;
> this is what you get when you use the JTree empty constructor;
> don't ask why they did it this way; maybe it was a demo thing
> that never got cleaned up; maybe they left it in because somebody
> thought it was cute; if they had to have something in there i don't
> know why they just didn't put in a dummy root node but there
> it is

Maybe just because using a null node as root isn't allowed in current
implementation (UnallowedValueException thrown)...

-- 
Guillaume Rousse

Murphy's law : If anything can go wrong, it will.
O'Tool's commentary : Murphy was an optimist.

Jet, Guillaume and Raffael,

Thanks a lot for the fast reply.
I didn't knew that the java sources where shipped with the JDK.
Now everything is clear.

Thanks again,

Jan

Probably you use a Tree object that is already defined by JBuilder or you.

Anteo


<janc2000@deja.com> wrote in message
3a152ef5$0$20284$73bec57d@news.be.uu.net...
> Hi,
>
> I've created a JFrame based window which contains a JTree object (I'm
using
> JBuilder 4).
> To my big surpirse this JTree has a root node with 3 subnodes named
> "colors", "sports" and "food",
> although I have not added any code to populate the three.
> I've done a scan of all my sources on this names and could not find any of
> them.
>
> Anybody knows what is going on?
>
>
> Jan
>
>

Its just for testing, trees in other languages/libraries have the same
feature
the'll go aaway when you add your own nodes..
<janc2000@deja.com> wrote in message
news:3a152ef5$0$20284$73bec57d@news.be.uu.net...
> Hi,
>
> I've created a JFrame based window which contains a JTree object (I'm
using
> JBuilder 4).
> To my big surpirse this JTree has a root node with 3 subnodes named
> "colors", "sports" and "food",
> although I have not added any code to populate the three.
> I've done a scan of all my sources on this names and could not find any of
> them.
>
> Anybody knows what is going on?
>
>
> Jan
>
>