Java开发网 - when is the method Destory() invoked in Servlet

Topic: when is the method Destory() invoked in Servlet

1.when is the method Destory() invoked in Servlet

Posted by: eqq2002
Posted on: 2006-12-16 10:54

I post it here because I consider it is a basic question.It is said Java can destruct all objects automaticlly. So the most confused thing for me is why we still need destory(). When I started to study a couple of examples in javax.servlet.*; I found out some real reasons, you can save to local disk/medium the information as state descriptor or teminate a thread. Then comes the doubt, when Destory() is invoked in Servlet? It is the time that the my Servlet class is recompiling so Tomcat5.0(for example ) have to do that before load a new one, or the time Tomcat shutdown, or I invoke it by my other classes? Are these mentioned above right？And are there other situations? Especially the invoker is the Tomcat it self!
By the way,When the Tomcat Collapse suddenly , invoking seems not happen。