Scheduler implementation in Java

Hello All,
I need to implement the scheduler in Java, Here is my requirement
We need to run the particular events in scheduled intervals like weekly, monthly,Daily etc.we have the time stored in database, we need to compare the current time with the time stored in database and run the event.
I know that using threads we can run the events, but i heard that it is not efficient way, could any one helps me how to run the scheduler events in Java.
Iam working in Java (jdk 1.3), Linux, Apache
Thanks
Katta Srinivas

You can write a Servlet which has a daemon thread which checks the database every (day?) specified interval.
Thread servletThread = new Thread(this);
//check database
If no work
//Sleep for a day
If something scheduled
//Do the batch process
Don't forget to destroy the thread in the destroy() method of the servlet.

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