Is it possible make some handler that will do something when user shutdown computer with Java on Windows XP (optional, win7)? How?
Thanks.
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2 Answers
It is possible to add a shutdown hook to your Java program which is invoked if the JVM is shutdown for any reason (other than including O/S shutdown. Is that what you want?System.exit())
Use: java.lang.Runtime.addShutdownHook(Thread):
Runtime.getRuntime().addShutdownHook(new Thread() {
public void run() {
// shutdown code here
}
});
1 Comment
aperkins
iirc, at leats in Java 6, shutdown hooks still run even if System.exit() is called - the only time they are not is if the process is sent a kill command (or the OS equivalent)
a shutdown hook should do the job.
From API Doc:
Registers a new virtual-machine shutdown hook. The Java virtual machine shuts down in response to two kinds of events:
- The program exits normally, when the last non-daemon thread exits or when the exit (equivalently, System.exit) method is invoked, or
- The virtual machine is terminated in response to a user interrupt, such as typing ^C, or a system-wide event, such as user logoff or system shutdown.
Runtime.getRuntime().addShutdownHook(new Thread() {
public void run() {
// do something
}
});
