How to Override method in static context?

Request is an Abstract class with an abstract onFinish method.

Request.authenticate is a static method that instantiates a new Request object. Why is the system not letting me force override onFininsh with this syntax???

Request sqr = Request.authenticate(act, outerBundle) {
    @Override
    pu开发者_运维问答blic void onFinish(String resp){System.out.println("HEY");}
};

You cannot override a method of an already existing instance. The best you could do is to extend Request. This is off the top of my head but something like this should work, assuming you can control the type of Request that is returned:

public class MyRequest extends Request
{
  private MyFinish _finish;
  public MyRequest(MyFinish finish)
  {
    _finish=finish;
  }

  public void setFinish(MyFinish finish)
  {
     _finish=finish;
  }

  @Override
  public void onFinish(String resp)
  {
    _finish.doFinish(resp);    
  }
}

public interface MyFinish
{
  public void doFinish(String resp);
}

You would then plug in your custom finishing classes that implement MyFinish.