flex中的主程序mxml文件調用相應的ActionScript

 <?xml version="1.0"?>
<!-- usingas/AccessingPackagedClasses.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script><![CDATA[
           import MyPackage.Util.MyClass;
                   private var mc:MyClass = new MyClass;
]]></mx:Script>
<mx:Button id="myButton" label="Click Me"
                    click="myButton.label=mc.returnAString()"/>
</mx:Application>