有时为了调试，需要把跟踪对象转换成字符串打印出来或写入控制台窗口。对于普通对象，使用toString()就可以很方便的转换。

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx"
			   creationComplete="init(event)">
	<fx:Script>
		<![CDATA[
			import mx.collections.ArrayCollection;
			import mx.controls.Alert;
			import mx.events.FlexEvent;
			import mx.utils.ObjectUtil;
			
			protected function init(event:FlexEvent):void
			{
				var ac:ArrayCollection = new ArrayCollection([
					{name:"hangge", age:28},
					{name:"张三", age:12},
					{name:"李四", age:15},
				]);
				
				Alert.show(ObjectUtil.toString(ac));
			}
		]]>
	</fx:Script>
</s:Application>

效果图如下：