StockWatcher example. null pointer because root panel cannot find html element 'stockList'
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Anil
Aug 6, 2008, 9:33:23 PM8/6/08
to Google Web Toolkit
Apparently there is a null pointer because root panel cannot find html
element 'stockList'.
[ERROR] Unable to load module entry point class
com.google.gwt.sample.stockwatcher.client.StockWatcher (see associated
exception for details)
java.lang.NullPointerException: null
at
com.google.gwt.sample.stockwatcher.client.StockWatcher.onModuleLoad(StockWatcher.java:
67)
line 67 ----> RootPanel.get("stockList").add(mainPanel);
in the file StockWatcher.html:
<div id="stockList"></div>
I used the commands in the tutorial:
C:\Projects\gwt-windows-1.5.0\StockWatcher>projectCreator -eclipse
StockWatcher -out StockWatcher
C:\Projects\gwt-windows-1.5.0\StockWatcher>applicationCreator -eclipse
StockWatcher -out StockWatcher
com.google.gwt.sample.stockwatcher.client.StockWatcher
It seems like a config thing. Any help appreciated.
thanks,
Anil
element 'stockList'.
[ERROR] Unable to load module entry point class
com.google.gwt.sample.stockwatcher.client.StockWatcher (see associated
exception for details)
java.lang.NullPointerException: null
at
com.google.gwt.sample.stockwatcher.client.StockWatcher.onModuleLoad(StockWatcher.java:
67)
line 67 ----> RootPanel.get("stockList").add(mainPanel);
in the file StockWatcher.html:
<div id="stockList"></div>
I used the commands in the tutorial:
C:\Projects\gwt-windows-1.5.0\StockWatcher>projectCreator -eclipse
StockWatcher -out StockWatcher
C:\Projects\gwt-windows-1.5.0\StockWatcher>applicationCreator -eclipse
StockWatcher -out StockWatcher
com.google.gwt.sample.stockwatcher.client.StockWatcher
It seems like a config thing. Any help appreciated.
thanks,
Anil
Ian Bambury
Aug 6, 2008, 10:45:18 PM8/6/08
to Google-We...@googlegroups.com
Or, more likely, mainPanel is null. Where did you get the code from?
2008/8/7 Anil <anil...@gmail.com>
--
Ian
http://examples.roughian.com
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Anil
Aug 9, 2008, 11:13:02 AM8/9/08
to Google Web Toolkit
Thank you for replying; in the debugger, I put a watch and see
" RootPanel.get("stockList")"= null
I am using GWT 1.5
The html file is in /public and is:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html;
charset=UTF-8">
<title>StockWatcher</title>
<script type="text/javascript" language="javascript"
src="com.google.gwt.sample.stockwatcher.StockWatcher.nocache.js"></
script>
</head>
<body>
<img src="images/GoogleCode.png" />
<h1>Stock Watcher</h1>
<div id="stockList"></div>
</body>
</html>
On Aug 6, 9:45 pm, "Ian Bambury" <ianbamb...@gmail.com> wrote:
> Or, more likely, mainPanel is null. Where did you get the code from?
>
> 2008/8/7 Anil <anil.r...@gmail.com>
" RootPanel.get("stockList")"= null
I am using GWT 1.5
The html file is in /public and is:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html;
charset=UTF-8">
<title>StockWatcher</title>
<script type="text/javascript" language="javascript"
src="com.google.gwt.sample.stockwatcher.StockWatcher.nocache.js"></
script>
</head>
<body>
<img src="images/GoogleCode.png" />
<h1>Stock Watcher</h1>
<div id="stockList"></div>
</body>
</html>
On Aug 6, 9:45 pm, "Ian Bambury" <ianbamb...@gmail.com> wrote:
> Or, more likely, mainPanel is null. Where did you get the code from?
>
>
>
>
>
>
> > Apparently there is a null pointer because root panel cannot find html
> > element 'stockList'.
>
> > [ERROR] Unable to load module entry point class
> > com.google.gwt.sample.stockwatcher.client.StockWatcher (see associated
> > exception for details)
> > java.lang.NullPointerException: null
> > at
>
> > com.google.gwt.sample.stockwatcher.client.StockWatcher.onModuleLoad(StockWatcher.java:
> > 67)
>
> > line 67 ----> RootPanel.get("stockList").add(mainPanel);
>
> > in the file StockWatcher.html:
>
> > <div id="stockList"></div>
>
> > I used the commands in the tutorial:
>
> > C:\Projects\gwt-windows-1.5.0\StockWatcher>projectCreator -eclipse
> > StockWatcher -out StockWatcher
> > C:\Projects\gwt-windows-1.5.0\StockWatcher>applicationCreator -eclipse
> > StockWatcher -out StockWatcher
> > com.google.gwt.sample.stockwatcher.client.StockWatcher
>
> > It seems like a config thing. Any help appreciated.
> > thanks,
> > Anil
>
> --
> Ianhttp://examples.roughian.com
>
>
>
>
> > Apparently there is a null pointer because root panel cannot find html
> > element 'stockList'.
>
> > [ERROR] Unable to load module entry point class
> > com.google.gwt.sample.stockwatcher.client.StockWatcher (see associated
> > exception for details)
> > java.lang.NullPointerException: null
> > at
>
> > com.google.gwt.sample.stockwatcher.client.StockWatcher.onModuleLoad(StockWatcher.java:
> > 67)
>
> > line 67 ----> RootPanel.get("stockList").add(mainPanel);
>
> > in the file StockWatcher.html:
>
> > <div id="stockList"></div>
>
> > I used the commands in the tutorial:
>
> > C:\Projects\gwt-windows-1.5.0\StockWatcher>projectCreator -eclipse
> > StockWatcher -out StockWatcher
> > C:\Projects\gwt-windows-1.5.0\StockWatcher>applicationCreator -eclipse
> > StockWatcher -out StockWatcher
> > com.google.gwt.sample.stockwatcher.client.StockWatcher
>
> > It seems like a config thing. Any help appreciated.
> > thanks,
> > Anil
>
> --
Ian Bambury
Aug 9, 2008, 10:48:17 PM8/9/08
to Google-We...@googlegroups.com
Hi Anil,
If everything else was OK, then it would work, so something strange is happening elsewhere. If you want to send me a zip of the project, I'll have a look.
Ian
2008/8/9 Anil <anil...@gmail.com>
Nico
Sep 2, 2008, 6:07:09 PM9/2/08
to Google Web Toolkit
Hi Guys,
I am pretty much stuck on exactly the same problem and am not entirely
sure what's wrong. Anil or Ian......if you have figured out the
solution, could you post it up here please? I'd be very grateful!
Thanks,
Nico
On Aug 10, 3:48 am, "Ian Bambury" <ianbamb...@gmail.com> wrote:
> Hi Anil,
>
> If everything else was OK, then it would work, so something strange is
> happening elsewhere. If you want to send me a zip of the project, I'll have
> a look.
>
> Ian
>
> 2008/8/9 Anil <anil.r...@gmail.com>
I am pretty much stuck on exactly the same problem and am not entirely
sure what's wrong. Anil or Ian......if you have figured out the
solution, could you post it up here please? I'd be very grateful!
Thanks,
Nico
On Aug 10, 3:48 am, "Ian Bambury" <ianbamb...@gmail.com> wrote:
> Hi Anil,
>
> If everything else was OK, then it would work, so something strange is
> happening elsewhere. If you want to send me a zip of the project, I'll have
> a look.
>
> Ian
>
Ian Bambury
Sep 2, 2008, 9:53:56 PM9/2/08
to Google-We...@googlegroups.com
As I remember, Anil never found the problem, he got fed up with it and started again from scratch and it worked - put it down to some caching problem, but didn't find out for sure.
He sent me the zip and I couldn't get it *not* to work, so I wasn't able to help. You can send your project if you like, but it might be the same situation.
Ian
2008/9/2 Nico <nic...@googlemail.com>
--
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http://examples.roughian.com
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Nico
Sep 3, 2008, 6:23:45 AM9/3/08
to Google Web Toolkit
Hi Ian
and thank you for the speedy reply. I have solved it by now.....it was
a combination of screen blindness, a late night and a missing
quotation mark in my html.
Nico
On Sep 3, 2:53 am, "Ian Bambury" <ianbamb...@gmail.com> wrote:
> As I remember, Anil never found the problem, he got fed up with it and
> started again from scratch and it worked - put it down to some caching
> problem, but didn't find out for sure.
>
> He sent me the zip and I couldn't get it *not* to work, so I wasn't able to
> help. You can send your project if you like, but it might be the same
> situation.
>
> Ian
>
> 2008/9/2 Nico <nico...@googlemail.com>
and thank you for the speedy reply. I have solved it by now.....it was
a combination of screen blindness, a late night and a missing
quotation mark in my html.
Nico
On Sep 3, 2:53 am, "Ian Bambury" <ianbamb...@gmail.com> wrote:
> As I remember, Anil never found the problem, he got fed up with it and
> started again from scratch and it worked - put it down to some caching
> problem, but didn't find out for sure.
>
> He sent me the zip and I couldn't get it *not* to work, so I wasn't able to
> help. You can send your project if you like, but it might be the same
> situation.
>
> Ian
>
dacki Sun
Oct 10, 2013, 4:43:09 AM10/10/13
to google-we...@googlegroups.com, Google Web Toolkit, anil...@gmail.com
Hi!
I also had a NullPointerException but my problem was that I forgot to write the id in double quotes:
So I changed it from:
<div id=content></div>
To:
<div id="content"></div>
Maybe that helps somebody.
dacki
I had to simply change the code given by Google tutorial to something like this...
From:
// Associate the Main panel with the HTML host page.
RootPanel.get("stockList").add(mainPanel);
Something like this..
// Associate the Main panel with the HTML host page.
RootPanel.get().add(mainPanel);
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