Quartz is a full-featured, open source job scheduling framework written entirely in Java.
It can be integrated with, or used along side virtually any J2EE or J2SE application - from the
smallest stand-alone application to the largest e-commerce system. Job scheduler is a system that
is responsible for executing other software components when a pre-determined (scheduled) time arrives.
Quartz is quite flexible. It contains multiple usage paradigms that can be used separately or
together to achieve the desired behavior. And it enable you to write the code in the way that seems
most natural to your project.
For read more inormation,Examples and Tutorials on Quartz Scheduler visit to :http://www.roseindia.net/quartz/index.shtml