JSF SelectOneMenu selected item - jsf

Question

I can't get the selected item from a SelectOneMenu. I supply an ArrayList to the menu and want the user to select one of it. I put the menu into a form, so I have a commandButton which I intended to use to perform the selection. This implementation gives me this error : Cannot convert user3 of type class java.lang.String to class java.util.ArrayList when I select from the menu "user3", so it actually performs the selection correctly. The error refers to this line
<h:selectOneMenu value="#{user.myUsers}"
Here is the part of my xhtml which generates the selectOneMenu.
<h:panelGrid columns="3">
<h:form>
<h:selectOneMenu value="#{user.myUsers}">
<f:selectItems value="#{user.myUsers }"/>
</h:selectOneMenu>
<h:commandButton value="#{msgs.remove_user}" action="#{user.select }" ></h:commandButton>
</h:form>
<h:outputText value="#{ user.select}"></h:outputText>
</h:panelGrid>
And here is my UserBean:
#ManagedBean(name="user")
#SessionScoped
public class UserBean implements Serializable {
private String selected;
public ArrayList<String> getMyUsers()throws Exception
{
ArrayList<String> ret;
MySQLConnection conn = new MySQLConnection();
try{
ret = conn.getMyUsers(name);
}finally
{
conn.closeConnection();
}
return ret;
}
public String getSelect() throws Exception
{
if (this.selected==null) return this.getMyUsers().get(0);
return this.selected;
}
public void setSelect(String s)
{
this.selected = s;
}
}

Answer 1

Your arraylist is mapped to
<f:selectItems value="#{user.myUsers}"/>,
and after selection you are trying to put the selected value to the same list:
<h:selectOneMenu value="#{user.myUsers}">
You should have some object (or string in your case) in your managed bean linked with your view and fill it by selected item of myUsers. For example:
private String selectedUser; // + appropriate getter and setter
and <h:selectOneMenu> should look like:
<h:selectOneMenu value="#{user.selectedUser}">
selected item sould be stored in selectedUser to the end of jsf lifecycle

Answer 2

<table class="tableClass" id="productDescriptionTable">
<thead>
<tr class="trPDClass">
<th class="thPDClass"></th>
<th class="thPDClass">Feature</th>
<th class="thPDClass">SubFeature</th>
`enter code here`<th class="thPDClass">Type</th>
<th class="thPDClass">Sub-Feature Value</th>
`enter code here`<th class="thPDClass">Is Active</th>
<th class="thPDClass">Deleted</th>
</tr>
</thead>
<tbody>
<tr class="trPDClass">
<td class="tdPDClass" style="width: 30;" ><input type="checkbox" /></td>
<td class="tdPDClass"><input type="text" id="0PDfeature" name="PDfeature" /></td>
<td class="tdPDClass"><input type="text" id="0PDsubFeature" name="PDsubFeature" /></td>
<td class="tdPDClass"><input type="text" id="0PDtype" name="PDtype" /></td>
<td class="tdPDClass">
<div id="0PDsubFeatureValueDiv" name="PDsubFeatureValueDiv"></div>
</td>
<td class="tdPDClass">
<table class="radioClass">
<tr>
<td width="24%"><input type="radio" name="PDisActive" id="PDisActiveY" value="Y" /></td>
<td width="40%">Yes</td>
<td width="20%"><input type="radio" name="PDisActive" id="PDisActiveN" value="N" /></td>
<td width="16%">No</td>
</tr>
</table>
</td>
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<td width="24%"><input type="radio" name="PDdeleted" id="0PDdeletedY" value="Y" /></td>
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<td width="20%"><input type="radio" name="PDdeleted" id="0PDdeletedN" value="N" /></td>
<td width="16%">No</td>
</tr>
</table>
</td>
</tr>
</tbody>
</table>