같은 객체와 다른 객체 참조의 차이점

package {
import flash.display.Sprite;
import flash.display.BlendMode;
[SWF(backgroundColor = 0x000000)]
public class ASExam33 extends Sprite {
private var sprObj:Sprite = new Sprite();
public function ASExam33() {
addCircle1();
addCircle2();
addCircle3();
}
private function addCircle1():void {
// 아래 생성자를 주석처리하면 하나의 객체만을 참조해서 그리게 된다.
var sprObj:Sprite = new Sprite();

this.addChild(sprObj);
sprObj.graphics.beginFill(0xFF0000);
sprObj.graphics.drawCircle(200,100,100);
sprObj.blendMode = BlendMode.LIGHTEN;
}
private function addCircle2():void {
var sprObj:Sprite = new Sprite();

this.addChild(sprObj);
sprObj.graphics.beginFill(0x00FF00);
sprObj.graphics.drawCircle(120,220,100);
sprObj.blendMode = BlendMode.LIGHTEN;
}
private function addCircle3():void {
var sprObj:Sprite = new Sprite();

this.addChild(sprObj);
sprObj.graphics.beginFill(0x0000FF);
sprObj.graphics.drawCircle(280,220,100);
sprObj.blendMode = BlendMode.LIGHTEN;
}
}
}<div class='small'>[이 게시물은 관리자님에 의해 2011-10-31 16:46:37 Flex에서 이동 됨]</div>