overiding start

[sun par]

suppose we overide start() method in a Thread and we have also a run() method,

class T1 extends Thread
{
  public void start()
  {
   T1 t1 = new Thread();
  } 
  public void run()
  {
  }
  public static void main(String args[])
  {
   T1 t2 = new T1();
   t2.start();
  }
}

How do we start the thread?
Thanks

[Valentin Crettaz]

You are not supposed to override the start method as it is natively implemented. If you do override, you'll have no way of starting the thread unless you call super.start() within the overriding start method.

[sun par]

Thanks Valentin

[Marlene Miller]

If you are not supposed to override start, why isn't it declared final?

[Valentin Crettaz]

That's a very good question Marlene
I think people at Sun did not want to prevent people from overriding start(). Although, they should update the doc and say that it is a very bad practice to do so, and that if overriding is not an option not to forget to invoke super.start() somewhere in the body of the overriding method.
Kathy could maybe shed some light on this...