clean() (Stop) all the scheduled tasks at once

Hi,
I'm looking for a way to stop all the runnin'scheduled tasks.
There is already a rought solution:
I can simply save all the Timer's references into an array or Set
(and put it inside a Singleton, or static class member) , and then
call .clean() an all the instances.

Looking for a better way, I suppose that this Timer's list should
already exist (somewhere). Is there any way to get an active Timer's
list?
This solution is far more elegant than the rought's one and this may
save me from changing the code mantained by other guys.
is it possible?

Thanks in advance
Regards

Fabiano

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