问题
One of the recommended uses of the ScheduledExecutorService is as a direct replacement for the Timer class, as discussed in numerous StackOverflow topics already:
- Java Timer vs ExecutorService?
- Difference between TimerTask and Executors.newScheduledThreadPool(1)
- What is the difference between schedule and scheduleAtFixedRate?
- Android Timer schedule vs scheduleAtFixedRate
However, the naming conventions of the methods supported by ScheduledExecutorService and Timer, are not identical. For example, whereas they both have a scheduleAtFixedRate() method, the Timer method
- schedule(TimerTask task, long delay, long period)
does not have a namesake counterpart.
Is the ScheduledExecutorService method
- scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit)
the one to use instead?
回答1:
https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ScheduledExecutorService.html#scheduleAtFixedRate(java.lang.Runnable,%20long,%20long,%20java.util.concurrent.TimeUnit)
Creates and executes 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.
https://docs.oracle.com/javase/7/docs/api/java/util/Timer.html#schedule(java.util.TimerTask,%20long,%20long)
Schedules the specified task for repeated fixed-delay execution, beginning after the specified delay. Subsequent executions take place at approximately regular intervals separated by the specified period.
I would say - Yes ;-)
来源：https://stackoverflow.com/questions/48956511/timer-vs-scheduledexecutorservice-scheduling