selectonemenu showen red when have date value - jsf

Question

i have a sample selectOneMenu that have List of date and date as values but when i try to validate i have it red i will show you my sample example :
my managed bean :
#ManagedBean
#SessionScoped
public class Testbean {
#EJB
private ManageOfPlanifieLocal manageOfPlanifie;
List<Date> listdate = new ArrayList<Date>();
Date newdate;
#PostConstruct
public void initialize() {
listdate=manageOfPlanifie.retournerdatedesplanif();;
}
public String gototest2(Date date)
{
return "test2.xhtml?faces-redirect=true";
}
public List<Date> getListdate() {
return listdate;
}
public void setListdate(List<Date> listdate) {
this.listdate = listdate;
}
public Date getNewdate() {
return newdate;
}
public void setNewdate(Date newdate) {
this.newdate = newdate;
}
}
and this is my two jsf pages :
test1.xhtml
<h:outputLabel for="dateplanif" value="date de planification : " />
<p:selectOneMenu id="dateplanif" value="#{ testbean.newdate}">
<f:selectItems value="#{testbean.listdate}" var="da" itemValue="#{da}" />
</p:selectOneMenu>
<p:commandButton value="suivant" style="color:black;" action="#{testbean.gototest2(testbean.listdate)}" update="#form" />
test2.xhtml
<h2>Choix de l'equipe</h2>
<h:outputText value="Date : "/>
<h:outputText value="#{ testbean.newdate}"/>
the problem i do sample transfer of data with out converstion just simple and i get that :
do you know i have it red and i cant move to the next page ??

Answer 1

When you have a list of Objects, you need to convert them, so that setting the value works properly. Try the following code.
<p:selectOneMenu id="dateplanif" value="#{testbean.newdate}">
<f:selectItems value="#{testbean.listdate}" var="da" itemValue="#{da}" />
<f:convertDateTime pattern="dd-MM-yyyy" />
</p:selectOneMenu>