sampleis.as

《Flash AS3殿堂之路》光盘源码 学习ActionScript 3.0

package org.kingda.book.basicoop.polymorphism
{
	import flash.display.Sprite;
	import flash.events.IEventDispatcher;
	import flash.events.EventDispatcher;
	public class SampleIs extends Sprite
	{
		public function SampleIs() {
			var a:int = 100;
			trace (a is Number);//输出:true
			trace (a is String);//输出:false
			trace (a is Object);//输出:true
			
			var foo:KingdaDispatcher = new KingdaDispatcher();			
			trace (foo is KingdaDispatcher);//输出:true
			trace (foo is EventDispatcher);	//输出:true
			trace (foo is IEventDispatcher);//输出:true
		}
	}
}
import flash.events.EventDispatcher;
class KingdaDispatcher extends EventDispatcher {}