Prevent shutdown after shutdown hook

Question

So, I should handle Ctrl-C. Ok, I can do that by registering a shutdown hook. And it works well until I want to prevent the shutdown. When Ctrl-C pressed I want to ask the user if he really wants to close the app, and if he isn't, then I want my app to continue running. The problem is I don't know how to prevent shutdown after Ctrl-C pressed.

Any help? :)

See http://stackoverflow.com/questions/2541475/capture-sigint-in-java — Michael Brewer-Davis, Oct 21 '11 at 17:12
See (later) answers to http://stackoverflow.com/questions/1216172/java-how-could-i-intercept-ctrlc-in-a-cli-application — Ed Staub, Oct 21 '11 at 17:14
Also, http://twit88.com/blog/2008/02/06/java-signal-handling/ — Ed Staub, Oct 21 '11 at 17:25
I have a similar problem. In my case I just want to delay or postpone the shutdown until my shutdown hook has finished running. — bikeman868, Oct 20 '22 at 21:37

score 0 · Accepted Answer · answered Jul 25 '13 at 15:27

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Once you're in a shutdown hook it's too late.

from Runtime.addShutdownHook:

Once the shutdown sequence has begun it can be stopped only by invoking the halt method, which forcibly terminates the virtual machine.

answered Jul 25 '13 at 15:27

Brad Mace

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score 0 · Answer 2 · answered Oct 21 '11 at 21:18

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You can't abort a shutdown from inside a shutdown hook. It will proceed.

answered Oct 21 '11 at 21:18

user207421

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Prevent shutdown after shutdown hook

2 Answers2