flex 18 ArrayCollection

ArrayCollectionTest.mxml


<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
 <mx:Panel width="134" height="114" layout="absolute" horizontalCenter="0" verticalCenter="0" title="ComboBox">
  <mx:ComboBox dataProvider="{acc}" horizontalCenter="0" verticalCenter="0" id="cb" change="show()"></mx:ComboBox>
 </mx:Panel>
 <mx:ArrayCollection id="acc">
  <mx:Object label="A" data="1"/>
  <mx:Object label="B" data="2"/>
  <mx:Object label="C" data="3"/>
  <mx:Object label="D" data="4"/>
 </mx:ArrayCollection>
 <mx:Script>
  <![CDATA[
   import mx.controls.Alert;
   function show():void{
    mx.controls.Alert.show(cb.selectedItem.data);
   }
  ]]>
 </mx:Script>
</mx:Application>