JSF value change Simple problem

Question

I am having a small difficulty understanding which approach should be used to initialize data in JSF.
Take this simple example:
There is a drop down with 2 items: 1, 2
        <h:selectOneMenu value="#{bean.value}"
          valueChangeListener="#{bean.change}" onchange="submit()">
          <f:selectItem itemLabel="1" itemValue="1"/>
          <f:selectItem itemLabel="2" itemValue="1"/>
        </h:selectOneMenu>Now, when page loads, it really shows the second value of the drop down selected.
But, when I simply add a "valueChangeListener" method, I can see that there is a problem:
  public void change(ValueChangeEvent event)
    System.out.println("I was here");
  }Whenever switching from value: 1 to: value: 2, the event is not activate. Since I was setting each time the constructor is built, the value "manually".
The problem gets much deeper when, for exmaple, I would like to show a table that changes according to several filters. Initially the data is loaded on the constructor. But when filter changes, the data should be reloaded. So I load it twice: Once in the constructor, then I have to rebuild data in the event itself.
Am I missing here something ? Or the JSF mechanism is missing somthing ... ;-)

Answer 1

It's beacuse its ValueChangeListener :) no a "LabelChangeListener".
Value for those two items should be different :)
Itemlabel is what you see in combobox, and itemValue is real value for item.
If you change your code to :
<f:selectItem itemLabel="1" itemValue="1"/>
<f:selectItem itemLabel="2" itemValue="2"/>it will work :)
Martin