Its not null. Observe it:
Client-Side:
Car car = new Car();
List<Person> listPerson = new ArrayList<Person>();
car.setName("Ferrari");
car.setType("Sport");
Person personDriver = new Person();
personDriver.setName("James");
person personPassenger = new Person();
personPassenger.setName("Victoria");
listPerson.add(personDriver);
listPerson.add(personPassenger);
car.setPersonList(listPerson);
Null? Where? Its instantiate and populated with Person!
On 1 out, 13:38, Isaac Truett <[email protected]> wrote:
> Because a pointer referenced on line 19 was null.
>
> http://publicint.blogspot.com/2009/04/nullpointerexception.html
>
>
>
> On Thu, Oct 1, 2009 at 11:56 AM, The Coder <[email protected]> wrote:
>
> > I have two Entities. Car and Person. Car have aListof Person. Its
> > just for example the problem. Well, we have it:
>
> > --
>
> > package br.com.oxylabtech.client.model;
>
> > public class Car implements IsSerializable {
>
> > // Attributes
> > private String name;
> > private String type;
> > privateList<Person> personList;
>
> > // G&S [omitted]
>
> > package br.com.oxylabtech.client.model;
>
> > public class Person implements IsSerializable {
>
> > // Attributes
> > private String name;
>
> > // G&S [omitted]
>
> > --
>
> > Then i have a page with a form that fills the Car and Person data,
> > something like it:
>
> > --
>
> > Car car = new Car();
> >List<Person> listPerson = new ArrayList<Person>();
>
> > car.setName("Ferrari");
> > car.setType("Sport");
>
> > Person personDriver = new Person();
> > personDriver.setName("James");
>
> > person personPassenger = new Person();
> > personPassenger.setName("Victoria");
>
> > listPerson.add(personDriver);
> > listPerson.add(personPassenger);
>
> > car.setPersonList(listPerson);
>
> > --
>
> > After, i need to save in the DB. I need to send to the server side
> > correct? Then, i have a service for it. Lets see:
>
> > --
>
> > dbService.save(car, new AsyncCallback<Boolean>() {
>
> > public void onFailure(Throwable
> > caught) {
> >
> > CustomWidgets.createDialogBox("Ops!!"); //This is a Custom
> > DialogBox()
> > }
>
> > public void onSuccess(Boolean
> > result) {
> > if (result) {
> >
> > CustomWidgets.createDialogBox("Yeah!");
> > } else {
> >
> > CustomWidgets.createDialogBox("Problem!");
> > }
> > }
> > });
>
> > --
>
> > But before the save, i want to see the Car and the Persons info. The
> > server side code is simple.
>
> > --
>
> > public Boolean save(Car car) {
> > try {
> > System.out.println("Car name: " + car.getNoma());
> > System.out.println("Car type: " + car.getType());
> > System.out.println(" ");
>
> > for (Person person : car.getPersonList()) {
> > System.out.println("Person: " +
> > person.getNome());
> > }
> > return true;
> > } catch (Exception e) {
> > e.printStackTrace();
> > return false;
> > }
> > }
>
> > --
>
> > But it occour:
>
> > --
>
> > Car Name: Ferrari
> > Car Type: Sport
>
> > java.lang.NullPointerException
> > at br.com.oxylabtech.server.dbService.save(ServiceImpl.java:19)
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>
> > --
>
> > Why? Thankx!
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