Call function periodically in Java

Question

we need run one function periodically in Java web application . How to call function of some class periodically ? Is there any way that call function when some event occured like high load in server and so on . what is crontab ? Is that work periodically ?

Answer 1

To call something periodically, see TimerTask

Answer 2

If you need something more robust you can use Quartz

As for crontab is the scheduling tool on Unix machines.