NumberFormatException for input String in datatable - jsf-2

Question

I have the following method in my DAO where I retrieve a list of persons :
public List<Personne> getAllUsers() {
Query query = em.createQuery("SELECT p FROM Personne p where TYPE(p) =Utilisateur");
#SuppressWarnings("unchecked")
List <Personne> personnes = query.getResultList();
return personnes;
}
I want to show the list of persons in a datatable :
<p:dataTable value="#{desacBean.users}" var="us" paginator="true" selection="# {desacBean.selectedUser}" selectionMode="single" rowKey="#{desacBean.getId(us)}}" first="1">
<p:ajax event="rowSelect" listener="#{desacBean.onUserSelect}"/>
<p:column>
<f:facet name="n">
<h:outputText value="nom" />
</f:facet>
<h:outputText value="#{us.nom}"/>
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="prenom" />
</f:facet>
<h:outputText value="#{us.prenom}"/>
</p:column>
</p:dataTable>
my BEAN :
#ManagedBean(name="desacBean")
#SessionScoped
public class DesactiveBean implements Serializable{
private static final long serialVersionUID = 1L;
private List<Personne> users = new ArrayList<Personne>();
private Personne selectedUser;
private boolean panelRendered;
UserDAO daoUser = new UserDaoImpl();
public void rowSelect(SelectEvent event){
selectedUser = (Personne)event.getObject();
System.out.println("selectedUser = "+selectedUser.getNom_ut());
this.panelRendered = true;
}
public int getId(Personne car)
{
return System.identityHashCode(car);
}
public void onUserSelect(SelectEvent event){
this.selectedUser = (Personne)event.getObject();
System.out.println("selectedUser = "+selectedUser.getNom_ut());
}
I have the following error when trying to show this dataTable :
java.lang.NumberFormatException: For input string: "prenom"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:492)
at java.lang.Integer.parseInt(Integer.java:527)
For input string: "prenom"
how can I fix it?

Answer 1

You'll probably encountering the same issue as the question answered here: NumberFormatException for input String