I want to call a method when I terminating my Java application forcefully. I need to release resource I used in my application.
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I want to call a method when I terminating my Java application forcefully. I need to release resource I used in my application.
It depends a bit on what you mean by “forcefully”, but I expect you want to add a Shutdown hook.
Shutdown hooks are small threads which are called whenever Java attempts to shut down. You can add one using the Runtime API, like so:
Of course, if you really force a shutdown (by turning the machine off, or running kill -9 on it,) the operating system will shut down Java without giving it a chance to clean up anything. In that case, you won’t be able to do anything about it.