Thread Groups

[Darryl Failla]

Apparently a thread group can be destroyed thereby destroying all contained threads. Why can thread groups be destroyed but not individual threads? Would it therefore be a legitimate technique to put each thread into its own ThreadGroup if it is desirable that errant threads in an application be destroyed?

[Andrew Sancroff]

"Destroys this thread group and all of its subgroups. This thread group must be empty, indicating that all threads that had been in this thread group have since stopped."

[Darryl Failla]

All threads in the group must be already stopped? What happens if you issue a destroy command on a ThreadGroup that has threads still running?

[Andrew Sancroff]

This is all in the JDK JavaDoc...

Throws:
IllegalThreadStateException - if the thread group is not empty or if the thread group has already been destroyed.