SimpleTrigger vs CronTrigger in Quartz Scheduler

SimpleTrigger
SimpleTrigger is used for scenarios in which we need to execute a job at a specific moment in time.

SimpleTrigger trigger = (SimpleTrigger) TriggerBuilder.newTrigger()
  .withIdentity("trigger1", "group1")
  .startAt(myStartTime)
  .forJob("job1", "group1")
  .build();

CronTrigger
The CronTrigger is used when we need schedules based on calendar-like statements.

CronTrigger trigger = TriggerBuilder.newTrigger()
  .withIdentity("trigger3", "group1")
  .withSchedule(CronScheduleBuilder.cronSchedule("0 0/2 8-17 * * ?"))
  .forJob("myJob", "group1")
  .build();

References
https://www.baeldung.com/quartz
https://stackoverflow.com/questions/26403391/difference-between-cron-trigger-and-simple-trigger-in-quartz-scheduler
http://www.quartz-scheduler.org/documentation/quartz-2.3.0/tutorials/crontrigger.html
https://www.freeformatter.com/cron-expression-generator-quartz.html

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