<p> Note: This method is called from both library code
and the Virtual Machine. It is called from VM to add
certain system threads to the system thread group.
@param t
the Thread to be added
@throws IllegalThreadStateException
if the Thread group has been destroyed
Adds the specified thread to this thread group.
<p> Note: This method is called from both library code and the Virtual Machine. It is called from VM to add certain system threads to the system thread group.
@param t the Thread to be added
@throws IllegalThreadStateException if the Thread group has been destroyed