#Deskgram java runtime code

They should also not rely blindly upon services that may Particular, be written to be thread-safe and to avoid deadlocks insofarĪs possible. Machine and should therefore be coded defensively. Shutdown hooks run at a delicate time in the life cycle of a virtual New shutdown hook or de-register a previously-registered hook.Īttempting either of these operations will cause an Once the shutdown sequence has begun it is impossible to register a Once the shutdown sequence has begun it can be stopped only by Sequence, as will non-daemon threads if shutdown was initiated by Note that daemon threads will continue to run during the shutdown When all the hooks have finished it will then Start all registered shutdown hooks in some unspecified order and let When the virtual machine begins its shutdown sequence it will User interrupt, such as typing ^C, or a system-wide event,Ī shutdown hook is simply an initialized but unstarted The virtual machine is terminated in response to a.Thread exits or when the exit (equivalently, The program exits normally, when the last non-daemon.The Java virtual machine shuts down in response to two kinds

Registers a new virtual-machine shutdown hook.

addShutdownHook public void addShutdownHook( Thread hook).

Throws: SecurityException - If a security manager is present and itsĮxiting with the specified status See Also: SecurityException,

Otherwise, this methodĬonventional and convenient means of invoking this method. Virtual machine with the given status code. If this method is invoked after all shutdown hooks have alreadyīeen run and the status is nonzero then this method halts the

#Deskgram java runtime code

Serves as a status code by convention, a nonzero status code indicatesĪre started in some unspecified order and allowed to run concurrently

Terminates the currently running Java virtual machine by initiating its