Quartz Job Scheduler
What you are looking for can be accomplished easily with the Quartz Job Scheduler Library.
It allows for scheduling of future event, and even with using cron
syntax.
Excerpt from project page:
What is Quartz Job Scheduling Library?
Quartz is a richly featured, open source job scheduling library that can be integrated within virtually any Java application - from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple or complex schedules for executing tens, hundreds, or even tens-of-thousands of jobs; jobs whose tasks are defined as standard Java components that may execute virtually anything you may program them to do. The Quartz Scheduler includes many enterprise-class features, such as support for JTA transactions and clustering.
Quartz is freely usable, licensed under the Apache 2.0 license.
See Overview.
See example # 3.