killing a java process

[paritoshcg]

when we kill a java process using kill -9 ,it gets killed instantaneously ..... How does JVM handles this SIGKILL?

[Nicholas Jordan]

System.exit(0);

[neilcoffey]

Nicholas -- is this true? As far as I'm aware SIGKILL causes an abrupt shutdown, so things like shutdown hooks and finalizers won't get run. (This is also how Goetz et al, p. 164, appear to describe things.)

[masijade]

With a kill -9 shutdown hooks, and the like, will not be executed. With a "normal" kill, SIGTERM, they do.

@OP: It's easy to test, write a program that does nothing but sleep, and give it a shutdown hook that simply prints a message, then kill it.