Overriding start() ?...........gotcha !!

I tried overriding start() , even though its not required since extending  thread means one can override run() that will be sufficient to do desired work . But again showing my stupidity i did that as below 


public class MyThread extends Thread{   
   
    public void start()
    {       
        System.out.println( " MyThread started " );
        run();
    }
    public void run(){
       
        for(int i =0 ; i < 3 ; i + + )

            System.out.println( i );

             throw new RuntimeException();
    }
   
    public static void main(String...a)
  {
        MyThread mt =  new MyThread();
        mt.start();
        System.out.println ( " Done " );
    }

}

And it made me puzzled that while running this program it executed in single threaded environment .
did you get the cause ? 
because in order to spawn a new thread start() method must call super.start() from with in start() that internally invokes run() method of custom thread .Other wise it would have been a regular method call .

So i need to over start as below & no need to call run() explicitly
public void start(String... args)
    {
       
        System.out.println ( " MyThread started " );
        super.start();
    }

Next Time respect Thread little more ! :-)