java - How can I call a function every day at 00:00 in my web service -

my problem have restful web service using class gestion. in class, have function _update_, , call function everyday @ 00:00.

i had no idea how that, looked web, , found using threads might option. however, don't know how can use it. have move _update_ function new class ?

if using ejb can use timer service

@singleton public class timerservice {     @inject     helloservice helloservice;      @schedule(second="0", minute="0", hour="0")     public void update(){         system.out.println("timer: " + helloservice.sayhello());     } } 

https://docs.oracle.com/javaee/7/tutorial/ejb-basicexamples004.htm