9. สร้างใหม่จากเก่า

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รหัสที่ 9-28  การใช้ @Override กำกับหน้าเมท็อด 
public class BallG extends Ball {
  ...
  @Override  
  public void move(DWindow w) {
    dy += gravity;
    super.move(w);
  }
©2009 S.Prasitjutrakul