AS3错误#1009 [英] AS3 error #1009

问题描述

当我运行以下代码时，出现错误#1009，表示var'list'为null?
有人可以告诉我此AS3代码有什么问题吗，我已经进行了大量搜索和阅读了大量信息，但是无论代码多么简单，它仍然是#1009问题.
谢谢，

When I run the following code I get a error #1009 saying that the var 'list' is null?
Can someone please tell me what's wrong with this AS3 code, I've done lots of searching and read lot of info but no matter how simple the code it's still the same erro #1009 issue.
Thanks,

package  
{  
    import flash.display.Sprite;
    import flash.events.MouseEvent;

    public class Main extends Sprite
    {    
        public var list:Array;

        public function Main() {  
            stage.addEventListener(MouseEvent.CLICK, add);
        }

        public function add(e:MouseEvent):void {
            list.push("ball");
            trace(list);
        } 
    }  
}

推荐答案

未初始化.

public var list:Array = [];

或

public var list:Array = new Array();

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