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Posted to user-java@ibatis.apache.org by Davy <jd...@telenet.be> on 2007/07/22 16:28:51 UTC
Problem with nullpointerException.
Can someone explain me how I get the code mentioned below running?
The problem is that it concerns a list and I don't know correct how I get it
to work, the code that I developed gives me each time a nullpointerexception
when I run it.
Can someone give me some information about what I do wrong?
public RowBeheer[] readBeheerList1(String ondnr) {
RowBeheer[] rowBeheer = null;
try {
dao.BeheerDAO beheerDao = (dao.BeheerDAO)
DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
model.BeheerExample beheerExample = new model.BeheerExample();
beheerExample.createCriteria().andReferentienummerLike(likesleutel);
List resultList = beheerDao.selectByExample(beheerExample);
if (resultList.size() > 0) {
for(int i = 0; i < resultList.size(); i++) {
rowBeheer[i] = new RowBeheer();
model.Beheer beheer = (model.Beheer) resultList.get(i);
rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
rowBeheer[i].setVolgnr(beheer.getVolgnr());
rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin()));
rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde()));
rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
return rowBeheer;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
Re: Problem with nullpointerException.
Posted by Larry Meadors <lm...@apache.org>.
Is it in the constructor?
Larry
On 7/24/07, Jdev <jd...@telenet.be> wrote:
>
>
>
> In my stacktrace I get an error on the line:
>
> rowBeheer[i] = new RowBeheer();
>
> In my logfile I get this as result =
>
> Error resultList : Cause : java.lang.NullPointerException
>
> I think that I have gone wrong somewhere; this block of code is loaded only
> in the memory and is not visible for the user. The systems looks up the user
> of he has permission to access the system. I think I do something wrong with
> []
>
>
>
> public RowBeheer[] readBeheerList1(String ondnr) {
>
> RowBeheer[] rowBeheer = null;
>
> try {
>
> dao.BeheerDAO beheerDao = (dao.BeheerDAO)
>
> DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
>
> model.BeheerExample beheerExample = new model.BeheerExample();
>
> beheerExample.createCriteria().andReferentienummerLike(likesleutel);
>
> List resultList = beheerDao.selectByExample(beheerExample);
>
> if (resultList.size() > 0) {
>
> for(int i = 0; i < resultList.size(); i++) {
>
> rowBeheer[i] = new RowBeheer(); error in the in stacktrace
>
> model.Beheer beheer = (model.Beheer) resultList.get(i);
>
> rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
>
> rowBeheer[i].setVolgnr(beheer.getVolgnr());
>
> rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin()));
>
> rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde()));
>
> rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
>
> rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
>
> return rowBeheer;
>
> }
>
> }
>
> } catch (Exception e) {
>
> e.printStackTrace();
>
> }
>
> return null;
>
> }
>
>
>
>
>
>
>
>
>
>
>
>
>
> -----Original Message-----
>
> From: Richard Yee [mailto:ryee@cruzio.com]
>
> Sent: zondag 22 juli 2007 21:46
>
> To: user-java@ibatis.apache.org
>
> Subject: Re: Problem with nullpointerException.
>
> What line is it occurring on?
>
> Did you initialize the DaoManager with the sqlMapConfig file?
>
> This code:
>
> dao.BeheerDAO beheerDao = (dao.BeheerDAO)
>
> DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
>
> could be put somewhere else b/c it only has to run once. You could store
>
> the DAO in application scope.
>
> -Richard
>
> Davy wrote:
>
> >
>
> > Can someone explain me how I get the code mentioned below running?
>
> >
>
> > The problem is that it concerns a list and I don't know correct how I
>
> > get it to work, the code that I developed gives me each time a
>
> > nullpointerexception when I run it.
>
> >
>
> > Can someone give me some information about what I do wrong?
>
> >
>
> > public RowBeheer[] readBeheerList1(String ondnr) {
>
> >
>
> > RowBeheer[] rowBeheer = null;
>
> >
>
> > try {
>
> >
>
> > dao.BeheerDAO beheerDao = (dao.BeheerDAO)
>
> >
> DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
>
> >
>
> > model.BeheerExample beheerExample = new model.BeheerExample();
>
> >
>
> >
> beheerExample.createCriteria().andReferentienummerLike(likesleutel);
>
> >
>
> > List resultList = beheerDao.selectByExample(beheerExample);
>
> >
>
> > if (resultList.size() > 0) {
>
> >
>
> > for(int i = 0; i < resultList.size(); i++) {
>
> >
>
> > rowBeheer[i] = new RowBeheer();
>
> >
>
> > model.Beheer beheer = (model.Beheer) resultList.get(i);
>
> >
>
> >
> rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
>
> >
>
> > rowBeheer[i].setVolgnr(beheer.getVolgnr());
>
> >
>
> > rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin()));
>
> >
>
> > rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde()));
>
> >
>
> > rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
>
> >
>
> > rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
>
> >
>
> > return rowBeheer;
>
> >
>
> > }
>
> >
>
> > }
>
> >
>
> > } catch (Exception e) {
>
> >
>
> > e.printStackTrace();
>
> >
>
> > }
>
> >
>
> > return null;
>
> >
>
> > }
>
> >
Re: Problem with nullpointerException.
Posted by Ashok Madhavan <as...@gmail.com>.
just curious. java.util.List would be a better fit here. any specific reason
why you want an array.
regards
Ashok
On 7/24/07, Chris Lamey <cl...@localmatters.com> wrote:
>
> Hello,
>
> As Ashok said on Sunday, the RowBeheer[] array is never initialized.
> When you try to assign a value into an uninitialized array, you get a
> null pointer exception.
>
> You need something like this after you get the resultList back from the
> selectByExample call:
>
> rowBeheer = new RowBeheer[resultList.size()];
>
> Cheers,
> Chris
>
> On Tue, 2007-07-24 at 18:22 +0200, Jdev wrote:
> > In my stacktrace I get an error on the line:
> >
> > rowBeheer[i] = new RowBeheer();
> >
> > In my logfile I get this as result =
> >
> > Error resultList : Cause : java.lang.NullPointerException
> >
> > I think that I have gone wrong somewhere; this block of code is loaded
> > only in the memory and is not visible for the user. The systems looks
> > up the user of he has permission to access the system. I think I do
> > something wrong with []
> >
> >
> >
> > public RowBeheer[] readBeheerList1(String ondnr) {
> >
> > RowBeheer[] rowBeheer = null;
> >
> > try {
> >
> > dao.BeheerDAO beheerDao = (dao.BeheerDAO)
> >
> > DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
> >
> > model.BeheerExample beheerExample = new model.BeheerExample();
> >
> > beheerExample.createCriteria().andReferentienummerLike(likesleutel);
> >
> > List resultList = beheerDao.selectByExample(beheerExample);
> >
> > if (resultList.size() > 0) {
> >
> > for(int i = 0; i < resultList.size(); i++) {
> >
> > rowBeheer[i] = new RowBeheer(); error in the in stacktrace
> >
> > model.Beheer beheer = (model.Beheer) resultList.get(i);
> >
> > rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
> >
> > rowBeheer[i].setVolgnr(beheer.getVolgnr());
> >
> > rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin
> ()));
> >
> > rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde
> ()));
> >
> > rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
> >
> > rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
> >
> > return rowBeheer;
> >
> > }
> >
> > }
> >
> > } catch (Exception e) {
> >
> > e.printStackTrace();
> >
> > }
> >
> > return null;
> >
> > }
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > -----Original Message-----
> >
> > From: Richard Yee [mailto:ryee@cruzio.com]
> >
> > Sent: zondag 22 juli 2007 21:46
> >
> > To: user-java@ibatis.apache.org
> >
> > Subject: Re: Problem with nullpointerException.
> >
> > What line is it occurring on?
> >
> > Did you initialize the DaoManager with the sqlMapConfig file?
> >
> > This code:
> >
> > dao.BeheerDAO beheerDao = (dao.BeheerDAO)
> >
> > DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
> >
> > could be put somewhere else b/c it only has to run once. You could
> > store
> >
> > the DAO in application scope.
> >
> > -Richard
> >
> > Davy wrote:
> >
> > >
> >
> > > Can someone explain me how I get the code mentioned below running?
> >
> > >
> >
> > > The problem is that it concerns a list and I don't know correct how
> > I
> >
> > > get it to work, the code that I developed gives me each time a
> >
> > > nullpointerexception when I run it.
> >
> > >
> >
> > > Can someone give me some information about what I do wrong?
> >
> > >
> >
> > > public RowBeheer[] readBeheerList1(String ondnr) {
> >
> > >
> >
> > > RowBeheer[] rowBeheer = null;
> >
> > >
> >
> > > try {
> >
> > >
> >
> > > dao.BeheerDAO beheerDao = (dao.BeheerDAO)
> >
> > > DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
> >
> > >
> >
> > > model.BeheerExample beheerExample = new model.BeheerExample();
> >
> > >
> >
> > > beheerExample.createCriteria().andReferentienummerLike(likesleutel);
> >
> > >
> >
> > > List resultList = beheerDao.selectByExample(beheerExample);
> >
> > >
> >
> > > if (resultList.size() > 0) {
> >
> > >
> >
> > > for(int i = 0; i < resultList.size(); i++) {
> >
> > >
> >
> > > rowBeheer[i] = new RowBeheer();
> >
> > >
> >
> > > model.Beheer beheer = (model.Beheer) resultList.get(i);
> >
> > >
> >
> > > rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
> >
> > >
> >
> > > rowBeheer[i].setVolgnr(beheer.getVolgnr());
> >
> > >
> >
> > >
> > rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin
> ()));
> >
> > >
> >
> > >
> > rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde
> ()));
> >
> > >
> >
> > > rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
> >
> > >
> >
> > > rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
> >
> > >
> >
> > > return rowBeheer;
> >
> > >
> >
> > > }
> >
> > >
> >
> > > }
> >
> > >
> >
> > > } catch (Exception e) {
> >
> > >
> >
> > > e.printStackTrace();
> >
> > >
> >
> > > }
> >
> > >
> >
> > > return null;
> >
> > >
> >
> > > }
> >
> > >
> >
>
RE: Problem with nullpointerException.
Posted by Chris Lamey <cl...@localmatters.com>.
Hello,
As Ashok said on Sunday, the RowBeheer[] array is never initialized.
When you try to assign a value into an uninitialized array, you get a
null pointer exception.
You need something like this after you get the resultList back from the
selectByExample call:
rowBeheer = new RowBeheer[resultList.size()];
Cheers,
Chris
On Tue, 2007-07-24 at 18:22 +0200, Jdev wrote:
> In my stacktrace I get an error on the line:
>
> rowBeheer[i] = new RowBeheer();
>
> In my logfile I get this as result =
>
> Error resultList : Cause : java.lang.NullPointerException
>
> I think that I have gone wrong somewhere; this block of code is loaded
> only in the memory and is not visible for the user. The systems looks
> up the user of he has permission to access the system. I think I do
> something wrong with []
>
>
>
> public RowBeheer[] readBeheerList1(String ondnr) {
>
> RowBeheer[] rowBeheer = null;
>
> try {
>
> dao.BeheerDAO beheerDao = (dao.BeheerDAO)
>
> DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
>
> model.BeheerExample beheerExample = new model.BeheerExample();
>
> beheerExample.createCriteria().andReferentienummerLike(likesleutel);
>
> List resultList = beheerDao.selectByExample(beheerExample);
>
> if (resultList.size() > 0) {
>
> for(int i = 0; i < resultList.size(); i++) {
>
> rowBeheer[i] = new RowBeheer(); error in the in stacktrace
>
> model.Beheer beheer = (model.Beheer) resultList.get(i);
>
> rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
>
> rowBeheer[i].setVolgnr(beheer.getVolgnr());
>
> rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin()));
>
> rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde()));
>
> rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
>
> rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
>
> return rowBeheer;
>
> }
>
> }
>
> } catch (Exception e) {
>
> e.printStackTrace();
>
> }
>
> return null;
>
> }
>
>
>
>
>
>
>
>
>
>
>
>
> -----Original Message-----
>
> From: Richard Yee [mailto:ryee@cruzio.com]
>
> Sent: zondag 22 juli 2007 21:46
>
> To: user-java@ibatis.apache.org
>
> Subject: Re: Problem with nullpointerException.
>
> What line is it occurring on?
>
> Did you initialize the DaoManager with the sqlMapConfig file?
>
> This code:
>
> dao.BeheerDAO beheerDao = (dao.BeheerDAO)
>
> DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
>
> could be put somewhere else b/c it only has to run once. You could
> store
>
> the DAO in application scope.
>
> -Richard
>
> Davy wrote:
>
> >
>
> > Can someone explain me how I get the code mentioned below running?
>
> >
>
> > The problem is that it concerns a list and I don’t know correct how
> I
>
> > get it to work, the code that I developed gives me each time a
>
> > nullpointerexception when I run it.
>
> >
>
> > Can someone give me some information about what I do wrong?
>
> >
>
> > public RowBeheer[] readBeheerList1(String ondnr) {
>
> >
>
> > RowBeheer[] rowBeheer = null;
>
> >
>
> > try {
>
> >
>
> > dao.BeheerDAO beheerDao = (dao.BeheerDAO)
>
> > DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
>
> >
>
> > model.BeheerExample beheerExample = new model.BeheerExample();
>
> >
>
> > beheerExample.createCriteria().andReferentienummerLike(likesleutel);
>
> >
>
> > List resultList = beheerDao.selectByExample(beheerExample);
>
> >
>
> > if (resultList.size() > 0) {
>
> >
>
> > for(int i = 0; i < resultList.size(); i++) {
>
> >
>
> > rowBeheer[i] = new RowBeheer();
>
> >
>
> > model.Beheer beheer = (model.Beheer) resultList.get(i);
>
> >
>
> > rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
>
> >
>
> > rowBeheer[i].setVolgnr(beheer.getVolgnr());
>
> >
>
> >
> rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin()));
>
> >
>
> >
> rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde()));
>
> >
>
> > rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
>
> >
>
> > rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
>
> >
>
> > return rowBeheer;
>
> >
>
> > }
>
> >
>
> > }
>
> >
>
> > } catch (Exception e) {
>
> >
>
> > e.printStackTrace();
>
> >
>
> > }
>
> >
>
> > return null;
>
> >
>
> > }
>
> >
>
RE: Problem with nullpointerException.
Posted by Jdev <jd...@telenet.be>.
In my stacktrace I get an error on the line:
rowBeheer[i] = new RowBeheer();
In my logfile I get this as result =
Error resultList : Cause : java.lang.NullPointerException
I think that I have gone wrong somewhere; this block of code is loaded only
in the memory and is not visible for the user. The systems looks up the user
of he has permission to access the system. I think I do something wrong with
[]
public RowBeheer[] readBeheerList1(String ondnr) {
RowBeheer[] rowBeheer = null;
try {
dao.BeheerDAO beheerDao = (dao.BeheerDAO)
DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
model.BeheerExample beheerExample = new model.BeheerExample();
beheerExample.createCriteria().andReferentienummerLike(likesleutel);
List resultList = beheerDao.selectByExample(beheerExample);
if (resultList.size() > 0) {
for(int i = 0; i < resultList.size(); i++) {
rowBeheer[i] = new RowBeheer(); error in the in stacktrace
model.Beheer beheer = (model.Beheer) resultList.get(i);
rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
rowBeheer[i].setVolgnr(beheer.getVolgnr());
rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin()));
rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde()));
rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
return rowBeheer;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
-----Original Message-----
From: Richard Yee [mailto:ryee@cruzio.com]
Sent: zondag 22 juli 2007 21:46
To: user-java@ibatis.apache.org
Subject: Re: Problem with nullpointerException.
What line is it occurring on?
Did you initialize the DaoManager with the sqlMapConfig file?
This code:
dao.BeheerDAO beheerDao = (dao.BeheerDAO)
DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
could be put somewhere else b/c it only has to run once. You could store
the DAO in application scope.
-Richard
Davy wrote:
>
> Can someone explain me how I get the code mentioned below running?
>
> The problem is that it concerns a list and I don't know correct how I
> get it to work, the code that I developed gives me each time a
> nullpointerexception when I run it.
>
> Can someone give me some information about what I do wrong?
>
> public RowBeheer[] readBeheerList1(String ondnr) {
>
> RowBeheer[] rowBeheer = null;
>
> try {
>
> dao.BeheerDAO beheerDao = (dao.BeheerDAO)
> DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
>
> model.BeheerExample beheerExample = new model.BeheerExample();
>
> beheerExample.createCriteria().andReferentienummerLike(likesleutel);
>
> List resultList = beheerDao.selectByExample(beheerExample);
>
> if (resultList.size() > 0) {
>
> for(int i = 0; i < resultList.size(); i++) {
>
> rowBeheer[i] = new RowBeheer();
>
> model.Beheer beheer = (model.Beheer) resultList.get(i);
>
> rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
>
> rowBeheer[i].setVolgnr(beheer.getVolgnr());
>
> rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin()));
>
> rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde()));
>
> rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
>
> rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
>
> return rowBeheer;
>
> }
>
> }
>
> } catch (Exception e) {
>
> e.printStackTrace();
>
> }
>
> return null;
>
> }
>
Re: Problem with nullpointerException.
Posted by Richard Yee <ry...@cruzio.com>.
What line is it occurring on?
Did you initialize the DaoManager with the sqlMapConfig file?
This code:
dao.BeheerDAO beheerDao = (dao.BeheerDAO)
DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
could be put somewhere else b/c it only has to run once. You could store
the DAO in application scope.
-Richard
Davy wrote:
>
> Can someone explain me how I get the code mentioned below running?
>
> The problem is that it concerns a list and I don’t know correct how I
> get it to work, the code that I developed gives me each time a
> nullpointerexception when I run it.
>
> Can someone give me some information about what I do wrong?
>
> public RowBeheer[] readBeheerList1(String ondnr) {
>
> RowBeheer[] rowBeheer = null;
>
> try {
>
> dao.BeheerDAO beheerDao = (dao.BeheerDAO)
> DaoManagerRequester.getDaoManager().getDao(dao.BeheerDAO.class);
>
> model.BeheerExample beheerExample = new model.BeheerExample();
>
> beheerExample.createCriteria().andReferentienummerLike(likesleutel);
>
> List resultList = beheerDao.selectByExample(beheerExample);
>
> if (resultList.size() > 0) {
>
> for(int i = 0; i < resultList.size(); i++) {
>
> rowBeheer[i] = new RowBeheer();
>
> model.Beheer beheer = (model.Beheer) resultList.get(i);
>
> rowBeheer[i].setReferentienummer(beheer.getReferentienummer());
>
> rowBeheer[i].setVolgnr(beheer.getVolgnr());
>
> rowBeheer[i].setRowdatumbegin(String.valueOf(beheer.getRowdatumbegin()));
>
> rowBeheer[i].setRowdatumeinde(String.valueOf(beheer.getRowdatumeinde()));
>
> rowBeheer[i].setKantoorcode(beheer.getKantoorcode());
>
> rowBeheer[i].setDossierstatus(beheer.getDossierstatus());
>
> return rowBeheer;
>
> }
>
> }
>
> } catch (Exception e) {
>
> e.printStackTrace();
>
> }
>
> return null;
>
> }
>