jsf - primeface default selection on radio buttons -

i have field 1 radio button:

xhtml:

<div class="col-md-4">     <p:selectoneradio id="gender"         value="#{onegobean.gender}" required="true"         requiredmessage="gender required">         <f:selectitems value="#{onegobean.gender}" />     </p:selectoneradio> </div> 

bean:

import javax.faces.model.selectitem;  private arraylist<selectitem> gender;  public final arraylist<selectitem> getgender() {     return gender; }  public final void setgender(final arraylist<selectitem> gender) {     this.gender = gender; }  public final void loadgender() {     gender = new arraylist<selectitem>();     gender.add(new selectitem("m", "male"));     gender.add(new selectitem("f", "female")); } 

during loadup arraylist being populated 2 genders. problem is, there no defualt value on web page. both radio buttons not selected. anyne knows why, want 1 button selected default (male)???

you mapping value of radio button list of values, should mapped single value. like:

xhtml:

<div class="col-md-4">     <p:selectoneradio id="gender"         value="#{onegobean.gender}" required="true"         requiredmessage="gender required">         <f:selectitems value="#{onegobean.genderlist}" />     </p:selectoneradio> </div> 

bean:

import javax.faces.model.selectitem;  private arraylist<selectitem> genderlist; private string gender = "m"; //give default value  public final arraylist<selectitem> getgenderlist() {     return genderlist; }  public final void setgenderlist(final arraylist<selectitem> genderlist) {     this.genderlist = genderlist; }  public string getgender() {     return gender; }  public void setgender(string gender) {     this.gender = gender; }  public final void loadgender() {     genderlist = new arraylist<selectitem>();     genderlist.add(new selectitem("m", "male"));     genderlist.add(new selectitem("f", "female")); }