h:selectOneMenu id="selectOneMenu1" value="#{radioBean.value}" 
                         valueChangeListener="#{radioBean.valueChange}" >
            <f:selectItem itemLabel="" itemValue="0" noSelectionOption="true"/>
            <f:selectItem itemLabel="Alpha" itemValue="32"/>
            <f:selectItem itemLabel="Beta" itemValue="128"/>
            <f:selectItem itemLabel="Gamma" itemValue="255"/>
            <f:ajax execute="@this" render="outputText1 selectOneRadio1"/>
        </h:selectOneMenu>

       