Euler 10

/**
 * Copyright enecre ( http://wonderfl.net/user/enecre )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/6nVP
 */

// forked from enecre's Euler 9
// forked from enecre's Euler 8
// forked from enecre's Euler 7
// forked from enecre's Euler 4
// forked from enecre's Euler3
// forked from enecre's forked from: Euler6
// forked from enecre's Euler6
// forked from enecre's Euler2
package {
    import flash.events.Event;
    import flash.text.TextField;
    import flash.display.Sprite;
    import org.libspark.thread.EnterFrameThreadExecutor;
    import org.libspark.thread.Thread;
    public class Euler extends Sprite {
        
        private var tf:TextField = new TextField();
        
        public function Euler() {
            // write as3 code here..
            tf.width = tf.height = 465;
            addChild(tf);
            Thread.initialize(new EnterFrameThreadExecutor());
            init();
        }
        
        private function init():void{
            new EratosthenesThread(tf).start();
        }

        
        private function tr(...o:Array):void{
            tf.appendText(o + "\n");
            tf.scrollV = tf.maxScrollV;
        }

    }
}
import flash.text.TextField;

import org.libspark.thread.Thread;

class EratosthenesThread extends Thread{
    private var _tf:TextField;
    
    private var firstItem:List;
    private var currentItem:List;
    
    public function EratosthenesThread(tf:TextField){
        _tf = tf;
        firstItem = new List(2);
        var i:int = 3;
        for(var li:List = this.firstItem; i <= 2000000; li = li.next){
            li.next = new List(i);
            i++;
        }
    }
    
    override protected function run():void{
        currentItem = this.firstItem;
        tr("Initialization Finished.");
        next(main);
    }
    
    private function main():void{
        var n:int = currentItem.num;
        _tf.text = String(n);
        removeBy(n);
        if(!currentItem.next)next(end);
        else {
            currentItem = currentItem.next;
            next(main);
        }
    }

    private function removeBy(key:int):void{
        try{
            for (var a:List = currentItem; a.next != null; a = a.next) {
                if (a.next.num % key == 0) {
                    if (a.next.next == null) {
                        a.next = null;
                        break;
                    }
                    else a.next = a.next.next;
                }
                else if (!a.next.next) break;
            }
        }
        catch (e:Error) {
            tr(e.message, a == null);
        }
    }
    
    private function end():void{
        tr(sum());
    }
    
    private function sum():int{
        var sum:int = 0;
        for (var a:List = firstItem; a != null; a = a.next) {
            sum += a.num;
        }
        return sum;
    }

    
    private function tr(...o:Array):void{
            _tf.appendText(o + "\n");
            _tf.scrollV = _tf.maxScrollV;
        }

}

class List{
    private var _num:int;
    public var next:List;
    
    public function List(val:int){
        _num = val;
        next = null;
    }
    
    public function get num():int{
        return _num;    
    }
}