java - how do external changes to the system clock affect java util timer?

I've got a bunch of timertasks scheduled on a timer. Some of them are run once, other开发者_开发问答s are fixedrate repeating tasks.

If the system clock is modified externally after things have been scheduled, how are the scheduled tasks affected?

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If by "the system clock," you mean the clock that keeps human-time, then that is independent of any timers you are running in your app, unless they in turn depend specifically on the time of day.

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And of course if you mean "Time of Day" (like class Date), then the change to the system clock will be reflected in your objects.