runtimecheckexample.mxml

《Flex第一步:基于ActionScript 3.0的Flex 2应用开发》采用概念讲解与实例结合的方式

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
	 creationComplete="init()">
	 
	 <mx:Script>
	 	<![CDATA[

	 		internal function init():void{
	 			var str:* = "Hello,World";
	 			try{
					myCanvas.addChild(str);
	 			}catch (errObject:Error) {
  					trace("The error message is: " + errObject.message);
				}	 			
	 		}
	 	]]>
	 </mx:Script>
	
	<mx:Canvas id="myCanvas" />
</mx:Application>