flex数据类型转换

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

var myInt:int = parseInt(input.text);?
var myFloat:Number = parseFloat(input.text);?
var myNumber:Number = new Number(input.text);?
// use the toString() method to convert from a number to a string?
mx.controls.Alert.show("Integer: " + myInt.toString() +?
"; Float: " + myFloat.toString() +?
"; Number: " + myNumber.toString());?
}?
]]>?
</mx:Script>?
<mx:TextInput id="input" x="10" y="10" width="78"/>?
<mx:Button x="96" y="10" label="Show Number" click="showInput();"/>?