This question would receive more responses on a forum. Have you tried one like javaranch.com ?

Thanks for posting such a informative article.

Well, in the article there is “The shutdown hook will execute only on normal termination or orderly shutdown.”
I have a query, what if there is need to handle such kind of imroper termination situtaion?

In our project we implemnetd a locking system. In this when instance executes it’s look for a text file.
if exist then instance never executes, otherwise creates this text file,
and add the shutdown hook on this for deleting this text file at end of execution.

Can you suggest what would be best way to do this, even when there is improper termination of progra?

Thanks,
Tanzy.