ScheduledFuture<?> | 
ScheduledExecutorService.schedule(Runnable command,
        long delay,
        TimeUnit unit) | 
 Submits a one-shot task that becomes enabled after the given delay. 
 | 
<V> ScheduledFuture<V> | 
ScheduledExecutorService.schedule(Callable<V> callable,
        long delay,
        TimeUnit unit) | 
 Submits a value-returning one-shot task that becomes enabled
 after the given delay. 
 | 
ScheduledFuture<?> | 
ScheduledThreadPoolExecutor.schedule(Runnable command,
        long delay,
        TimeUnit unit) | 
  | 
<V> ScheduledFuture<V> | 
ScheduledThreadPoolExecutor.schedule(Callable<V> callable,
        long delay,
        TimeUnit unit) | 
  | 
ScheduledFuture<?> | 
ScheduledExecutorService.scheduleAtFixedRate(Runnable command,
                   long initialDelay,
                   long period,
                   TimeUnit unit) | 
 Submits a periodic action that becomes enabled first after the
 given initial delay, and subsequently with the given period;
 that is, executions will commence after
 initialDelay, then initialDelay + period, then
 initialDelay + 2 * period, and so on. 
 | 
ScheduledFuture<?> | 
ScheduledThreadPoolExecutor.scheduleAtFixedRate(Runnable command,
                   long initialDelay,
                   long period,
                   TimeUnit unit) | 
 Submits a periodic action that becomes enabled first after the
 given initial delay, and subsequently with the given period;
 that is, executions will commence after
 initialDelay, then initialDelay + period, then
 initialDelay + 2 * period, and so on. 
 | 
ScheduledFuture<?> | 
ScheduledExecutorService.scheduleWithFixedDelay(Runnable command,
                      long initialDelay,
                      long delay,
                      TimeUnit unit) | 
 Submits a periodic action that becomes enabled first after the
 given initial delay, and subsequently with the given delay
 between the termination of one execution and the commencement of
 the next. 
 | 
ScheduledFuture<?> | 
ScheduledThreadPoolExecutor.scheduleWithFixedDelay(Runnable command,
                      long initialDelay,
                      long delay,
                      TimeUnit unit) | 
 Submits a periodic action that becomes enabled first after the
 given initial delay, and subsequently with the given delay
 between the termination of one execution and the commencement of
 the next. 
 |