title: Detect if system time has been moved backwards in java, or time proof timers
body: <p>I have a box thats using ntp and we have several java programs running on them that display a clock.  The problem we are having is if anything kicks the system time backwards all our timers that do things like animate the clock stop and wait until the system time catches back up to where it was.  I need to find a way to either detect when the system time has been changed backwards and reset all our timers or a set of timers that can schedule repeatedly  but still be proof against the clock changing. </p>
  
  <p>As a note I already tried the quartz timer package it has the same problem as the regular java timers.</p>