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Posted to users@wicket.apache.org by Zeldor <pg...@gmail.com> on 2010/10/07 23:28:13 UTC
RadioChoice - what's wrong?
Hi,
I am trying to get through with the very basics of Wicket - radiochoice. But
somehow I got stuck and all solutions I tried made my problems even worse...
So, what am I doing wrong?
I have this code:
static final List<String> NUMBERS = Arrays.asList(new String[] { "1", "2",
"3" });
private RadioChoice<String> rc;
{
RadioChoice<String> rc = new RadioChoice<String>("numberRadioChoice", new
Model<String>(""), NUMBERS).setSuffix("");
add(rc.setRequired(true));
}
String _numbers = rc.getModelObject();
System.out.println(_numbers);
When I submit the form I get:
NullPointerException
What am I doing wrong then?
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Re: RadioChoice - what's wrong?
Posted by Igor Vaynberg <ig...@gmail.com>.
if number is null it will just print "null"
-igor
On Thu, Oct 7, 2010 at 11:49 PM, Zeldor <pg...@gmail.com> wrote:
>
> Well, _numbers is null :) That's why I wonder what's wrong with getting the
> ObjectModel - I must be doing smth wrong there :)
>
> On Fri, Oct 8, 2010 at 8:43 AM, Igor Vaynberg-2 [via Apache Wicket] <
> ml-node+2967914-1064517663-152413@n4.nabble.com<ml...@n4.nabble.com>
>> wrote:
>
>> in that case either your System or your System.out is null :)
>>
>> -igor
>>
>> On Thu, Oct 7, 2010 at 11:35 PM, Zeldor <[hidden email]<http://user/SendEmail.jtp?type=node&node=2967914&i=0>>
>> wrote:
>>
>> >
>> > 186 is System.out.println(_numbers);
>> > --
>> > View this message in context:
>> http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967903.html<http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967903.html?by-user=t>
>>
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Re: RadioChoice - what's wrong?
Posted by Zeldor <pg...@gmail.com>.
Well, _numbers is null :) That's why I wonder what's wrong with getting the
ObjectModel - I must be doing smth wrong there :)
On Fri, Oct 8, 2010 at 8:43 AM, Igor Vaynberg-2 [via Apache Wicket] <
ml-node+2967914-1064517663-152413@n4.nabble.com<ml...@n4.nabble.com>
> wrote:
> in that case either your System or your System.out is null :)
>
> -igor
>
> On Thu, Oct 7, 2010 at 11:35 PM, Zeldor <[hidden email]<http://user/SendEmail.jtp?type=node&node=2967914&i=0>>
> wrote:
>
> >
> > 186 is System.out.println(_numbers);
> > --
> > View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967903.html<http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967903.html?by-user=t>
>
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> >
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Re: RadioChoice - what's wrong?
Posted by Igor Vaynberg <ig...@gmail.com>.
in that case either your System or your System.out is null :)
-igor
On Thu, Oct 7, 2010 at 11:35 PM, Zeldor <pg...@gmail.com> wrote:
>
> 186 is System.out.println(_numbers);
> --
> View this message in context: http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967903.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
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Re: RadioChoice - what's wrong?
Posted by Jeremy Thomerson <je...@wickettraining.com>.
Do you use Eclipse? There is a compiler warning that you can turn on (it
should be on by default) that warns against this problem whenever you
may inadvertently be "hiding" other variables. I suggest to everyone I
teach that they turn it on (and perhaps even turn it up from warning to
error), and of course, stop ignoring the little yellow squiggly lines :)
On Sun, Oct 10, 2010 at 12:47 PM, Zeldor <pg...@gmail.com> wrote:
>
> It does! Thanks a lot! I knew it was something stupid and trivial. Huh, but
> it should not cause that still - I was defining TextFields in same way and
> then again to add parameters and it went fine.
>
> On Sun, Oct 10, 2010 at 7:11 PM, Andrea Del Bene [via Apache Wicket] <
> ml-node+2970427-965616561-152413@n4.nabble.com<ml...@n4.nabble.com>
> <ml...@n4.nabble.com>
> >
> > wrote:
>
> > Hello Zeldor,
> >
> > I've red your code and it seems that you define variable rc two times:
> > the first time as form private field and the second time just below
> > between braces. When onSubmit method calls rc.getModelObject() it uses
> > private field rc which was not initialized and so triggers a
> > NullPointerException. Try to remove the second type definition
> > "RadioChoice<String>" and it should work.
> >
>
--
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http://www.wickettraining.com
Re: RadioChoice - what's wrong?
Posted by Zeldor <pg...@gmail.com>.
It does! Thanks a lot! I knew it was something stupid and trivial. Huh, but
it should not cause that still - I was defining TextFields in same way and
then again to add parameters and it went fine.
On Sun, Oct 10, 2010 at 7:11 PM, Andrea Del Bene [via Apache Wicket] <
ml-node+2970427-965616561-152413@n4.nabble.com<ml...@n4.nabble.com>
> wrote:
> Hello Zeldor,
>
> I've red your code and it seems that you define variable rc two times:
> the first time as form private field and the second time just below
> between braces. When onSubmit method calls rc.getModelObject() it uses
> private field rc which was not initialized and so triggers a
> NullPointerException. Try to remove the second type definition
> "RadioChoice<String>" and it should work.
>
> > public class Registration extends WebPage {
> > public Registration() {
> > add(new FeedbackPanel("errorMsg"));
> > //New user registration form
> > Form<String> regForm = new
> > Form<String>("registrationForm",new Model<String>()) {
> > static final List<String> NUMBERS =
> > Arrays.asList(new String[] { "1", "2", "3" });
> >
> > private RadioChoice<String> rc;
> >
> > {
> > RadioChoice<String> rc = new
> > RadioChoice<String>("numberRadioChoice", new
> > Model<String>(""),NUMBERS).setSuffix("");
> > add(rc.setRequired(true));
> > }
> >
> > @Override
> > public void onSubmit() {
> > String _numbers = rc.getModelObject();
> > System.out.println(_numbers);
> > }
> > };
> > add(regForm);
> > }
> > }
>
>
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Re: RadioChoice - what's wrong?
Posted by andrea del bene <an...@libero.it>.
Hello Zeldor,
I've red your code and it seems that you define variable rc two times:
the first time as form private field and the second time just below
between braces. When onSubmit method calls rc.getModelObject() it uses
private field rc which was not initialized and so triggers a
NullPointerException. Try to remove the second type definition
"RadioChoice<String>" and it should work.
> public class Registration extends WebPage {
> public Registration() {
> add(new FeedbackPanel("errorMsg"));
> //New user registration form
> Form<String> regForm = new
> Form<String>("registrationForm",new Model<String>()) {
> static final List<String> NUMBERS =
> Arrays.asList(new String[] { "1", "2", "3" });
>
> private RadioChoice<String> rc;
>
> {
> RadioChoice<String> rc = new
> RadioChoice<String>("numberRadioChoice", new
> Model<String>(""),NUMBERS).setSuffix("");
> add(rc.setRequired(true));
> }
>
> @Override
> public void onSubmit() {
> String _numbers = rc.getModelObject();
> System.out.println(_numbers);
> }
> };
> add(regForm);
> }
> }
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Re: RadioChoice - what's wrong?
Posted by Zeldor <pg...@gmail.com>.
So maybe someone could just show me working RadioChoice code with OnSubmit
part? Just how to properly display it and grab data from it :) That should
solve the problem, as I would compare and see what I'm doing wrong.
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Re: RadioChoice - what's wrong?
Posted by Zeldor <pg...@gmail.com>.
Sure, but I posted pretty much everything related to radiochoice :) So I am
just not doing some obvious important steps for making RadioChoice work :)
Code, with all non-related parts removed, looks like that:
public class Registration extends WebPage {
public Registration() {
add(new FeedbackPanel("errorMsg"));
//New user registration form
Form<String> regForm = new Form<String>("registrationForm",
new Model<String>()) {
static final List<String> NUMBERS =
Arrays.asList(new String[] { "1", "2", "3" });
private RadioChoice<String> rc;
{
RadioChoice<String> rc = new
RadioChoice<String>("numberRadioChoice", new Model<String>(""),
NUMBERS).setSuffix("");
add(rc.setRequired(true));
}
@Override
public void onSubmit() {
String _numbers = rc.getModelObject();
System.out.println(_numbers);
}
};
add(regForm);
}
}
On Fri, Oct 8, 2010 at 3:58 PM, Zilvinas Vilutis [via Apache Wicket] <
ml-node+2968370-862341428-152413@n4.nabble.com<ml...@n4.nabble.com>
> wrote:
> Oh come on! no one will want to steal your non-working code!
>
> Use http://pastebin.com/ to show your code if you want someone's help ;)
>
> Žilvinas Vilutis
>
> Mobile: (+370) 652 38353
> E-mail: [hidden email]<http://user/SendEmail.jtp?type=node&node=2968370&i=0>
>
>
>
> On Thu, Oct 7, 2010 at 11:35 PM, Zeldor <[hidden email]<http://user/SendEmail.jtp?type=node&node=2968370&i=1>>
> wrote:
>
> >
> > 186 is System.out.println(_numbers);
> > --
> > View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967903.html<http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967903.html?by-user=t>
>
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> >
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> >
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> --------------------
> nothing is impossible
>
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Re: RadioChoice - what's wrong?
Posted by Zilvinas Vilutis <ci...@gmail.com>.
Oh come on! no one will want to steal your non-working code!
Use http://pastebin.com/ to show your code if you want someone's help ;)
Žilvinas Vilutis
Mobile: (+370) 652 38353
E-mail: cikasfm@gmail.com
On Thu, Oct 7, 2010 at 11:35 PM, Zeldor <pg...@gmail.com> wrote:
>
> 186 is System.out.println(_numbers);
> --
> View this message in context: http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967903.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
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Re: RadioChoice - what's wrong?
Posted by Zeldor <pg...@gmail.com>.
186 is System.out.println(_numbers);
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Re: RadioChoice - what's wrong?
Posted by Jeremy Thomerson <je...@wickettraining.com>.
On Thu, Oct 7, 2010 at 5:04 PM, Zeldor <pg...@gmail.com> wrote:
> Caused by: java.lang.NullPointerException
> at com.spiritia.auth.Registration$1.onSubmit(Registration.java:186)
>
The error is obviously at Registration.java:186 - please show us that code
if you can't figure it out.
--
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http://www.wickettraining.com
Re: RadioChoice - what's wrong?
Posted by Zeldor <pg...@gmail.com>.
I doubt anything else is needed, it throws NullPointerException at syso
attempt. Rest of the form is working properly - I can of course post more
code, but what would be needed?
Stacktrace is pretty generic too...
org.apache.wicket.RequestCycle logRuntimeException: Method
onFormSubmitted of interface
org.apache.wicket.markup.html.form.IFormSubmitListener targeted at
component [MarkupContainer [Component id = registrationForm]] threw an
exception
org.apache.wicket.WicketRuntimeException: Method onFormSubmitted of
interface org.apache.wicket.markup.html.form.IFormSubmitListener
targeted at component [MarkupContainer [Component id =
registrationForm]] threw an exception
...
...
...
Caused by: java.lang.reflect.InvocationTargetException
at com.google.appengine.runtime.Request.process-a82d7b755ed3a9dd(Request.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:43)
at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:182)
... 50 more
Caused by: java.lang.NullPointerException
at com.spiritia.auth.Registration$1.onSubmit(Registration.java:186)
at org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1538)
at org.apache.wicket.markup.html.form.Form.process(Form.java:934)
at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:896)
... 55 more
On Thu, Oct 7, 2010 at 11:51 PM, Igor Vaynberg-2 [via Apache Wicket] <
ml-node+2967607-1764587878-152413@n4.nabble.com<ml...@n4.nabble.com>
> wrote:
> cant help you without seeing more code and stack
>
> -igor
>
> On Thu, Oct 7, 2010 at 2:28 PM, Zeldor <[hidden email]<http://user/SendEmail.jtp?type=node&node=2967607&i=0>>
> wrote:
>
> >
> > Hi,
> >
> > I am trying to get through with the very basics of Wicket - radiochoice.
> But
> > somehow I got stuck and all solutions I tried made my problems even
> worse...
> > So, what am I doing wrong?
> >
> > I have this code:
> >
> > static final List<String> NUMBERS = Arrays.asList(new String[] { "1",
> "2",
> > "3" });
> >
> > private RadioChoice<String> rc;
> >
> > {
> > RadioChoice<String> rc = new
> RadioChoice<String>("numberRadioChoice", new
> > Model<String>(""), NUMBERS).setSuffix("");
> > add(rc.setRequired(true));
> > }
> >
> > String _numbers = rc.getModelObject();
> > System.out.println(_numbers);
> >
> > When I submit the form I get:
> > NullPointerException
> >
> > What am I doing wrong then?
> > --
> > View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967576.html<http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967576.html?by-user=t>
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Re: RadioChoice - what's wrong?
Posted by Igor Vaynberg <ig...@gmail.com>.
cant help you without seeing more code and stack
-igor
On Thu, Oct 7, 2010 at 2:28 PM, Zeldor <pg...@gmail.com> wrote:
>
> Hi,
>
> I am trying to get through with the very basics of Wicket - radiochoice. But
> somehow I got stuck and all solutions I tried made my problems even worse...
> So, what am I doing wrong?
>
> I have this code:
>
> static final List<String> NUMBERS = Arrays.asList(new String[] { "1", "2",
> "3" });
>
> private RadioChoice<String> rc;
>
> {
> RadioChoice<String> rc = new RadioChoice<String>("numberRadioChoice", new
> Model<String>(""), NUMBERS).setSuffix("");
> add(rc.setRequired(true));
> }
>
> String _numbers = rc.getModelObject();
> System.out.println(_numbers);
>
> When I submit the form I get:
> NullPointerException
>
> What am I doing wrong then?
> --
> View this message in context: http://apache-wicket.1842946.n4.nabble.com/RadioChoice-what-s-wrong-tp2967576p2967576.html
> Sent from the Users forum mailing list archive at Nabble.com.
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