macOS java automatic shutdown

[ashokformac]

when my java program shutdowns automatically or shutdowns when the system shut downs or or when systems crashes ,,, i want to perform some actions like updating database....

how can i do this ...

thanks in advance ...

 

[4409723]

when my java program shutdowns automatically or shutdowns when the system shut downs or or when systems crashes ,,, i want to perform some actions like updating database....

how can i do this ...

thanks in advance ...

Your second requirement seems nigh on impossible. When the system crashes it stops responding and is really in a bad state. There's no real way to have the system call some java program when it has crashed, and even if you did, I doubt that it would in be much of a state to start the JVM.

The other feature you want is possible, but that's what Google is for.

 

[LtRammstein]

Wouldn't be better to just do an Autosave kinda deal with it than having to elaborate on "shutdown"?

Steve

 

[4409723]

Wouldn't be better to just do an Autosave kinda deal with it than having to elaborate on "shutdown"?

Steve

Without a doubt.

 

[Helium3]

Runtime

You can at least partially get what you want by using the addShutdownHook(Thread hook) method on the java.lang.Runtime class. Take a look at the documentation on the Sun website for more information.

 

[ryan]

Depending on exactly what you're trying to accomplish adding a shutdown hook can get you at least partially there:

Runtime.getRuntime().addShutdownHook(new ShutdownHookThread());

private class ShutdownHookThread extends Thread {
   public void run() {
       System.out.println("Application shutdown");
   }
}

 

[ashokformac]

Just i want to perform some action when my program stopped externally...
ie..when stopped by IDE itself or Closing my system tray icon or closing from dock .....

how can i do this ...

thanks in advance

 

[4409723]

Not sure why you don't read the post directly above of yours. The answer is blatantly there, but seeing as you need somebody to hold your hand:

http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Runtime.html#addShutdownHook(java.lang.Thread)

 

[ashokformac]

I tried it but that shutdown hook method was not calling when i stops the program using Stop button in the IDE .....