java - SelectItems of SelectOneMenu always null -

when test printing selected item in console , returned null

here method create selectitem in managedbean:

public list<string> getlistematricule() throws hibernateexception {     list<string> matricules = new arraylist<string>();        (vehicule v : vehiculedao.getall())     {         matricules.add(v.getmatricule());         system.out.println(v.getmatricule());     }     return matricules ; }   public list<selectitem> getallmatricules() {     list<selectitem> options = new arraylist<selectitem>();     list<string> listmatricules = getlistematricule();      (string mat : listmatricules)     {            options.add(new selectitem(mat));         system.out.println("items = " + new selectitem(mat));     }     return options ; } 

and here variables in model contain getter , setters , constructor:

public class program {  private int id_progf; private int nbrheure; private float montantglobal; private string commentaire; private int cin_mon; private string matricule; private int cin_cand;  ///gettersand setters   ....   } 

the methode bring variables database (list)

@override public vehicule getmatricule(string matricule) {     session session = hibernateutil.currentsession();     vehicule v=(vehicule)session.get(vehicule.class, matricule);     return v; } 

and xhtml file, contains form:

<h:panelgrid columns="2" >                          <h:outputtext value="moniteur :" />                         <h:selectonemenu id="listenomprenom" title="nom et prenom"  value="{#programmb.np}">                             <f:selectitems value="#{moniteurmb.allnomprenom}" />                         </h:selectonemenu>                          <h:outputtext value="vehicule :" />                         <h:selectonemenu id="listematricules" title="matricules" value="{#programmb.program.matricule}">                             <f:selectitems value="#{vehiculemb.allmatricules}"  />                         </h:selectonemenu>                          <h:outputtext value="nombre heures:" />                         <p:inputtext value="#{programmb.program.nbrheure}" />               </h:panelgrid>                <p:commandbutton  value="save" action="#{programmb.ajouterprog}" /> 

in first look, saw problem in value attribute of both of selectonemenu bellow:

        <h:selectonemenu id="listenomprenom" title="nom et prenom"  value="{#programmb.np}">                <f:selectitems value="#{moniteurmb.allnomprenom}" />          </h:selectonemenu> 

and:

        <h:selectonemenu id="listematricules" title="matricules" value="{#programmb.program.matricule}">                  <f:selectitems value="#{vehiculemb.allmatricules}"  />          </h:selectonemenu> 

in both of them putted # in wrong place. change value="{#programmb.np}" value="#{programmb.np}" , value="{#programmb.program.matricule}" value="#{programmb.program.matricule}" , should work you!