It's not a secret anymore!
The moose likes Beginning Java and the fly likes asking about system.exit() Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Beginning Java
Bookmark "asking about system.exit()" Watch "asking about system.exit()" New topic

asking about system.exit()

kumar abhay
Ranch Hand

Joined: Oct 02, 2001
Posts: 53
hi there,
i hope u r doing fine.i have a confusion regarding system.exit(0).if i place there 1 or 2 or so on wat exactly happens inside it n how it manipulates this all.hope that u would solve my problem.
take care
kumar abhay
John Smith
Ranch Hand

Joined: Oct 08, 2001
Posts: 2937
The parameter in System.exit(status) is just a status. The value of it doesn't afeect anything. By convention, if you set it to non-zer, it means abnormal termination.
Eugene Kononov.
Ilja Preuss

Joined: Jul 11, 2001
Posts: 14112
Depending on the operating system, the exit value can be examined by the parent process that started the JVM.
For example, if you started a java process via Runtime.exec(...), you can determine the exit value via Process.exitValue().
In windows batch-files, you can use the ERRORLEVEL function to change flow depending on the exit value.
In Ant-Scripts, you can use the failonerror attribute in java-tasks to create a failed build when the exit value is not zero.
There are many other examples...

The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus
Thomas Paul
mister krabs
Ranch Hand

Joined: May 05, 2000
Posts: 13974
We used the exit value in korn shell scripts to conrol email notifications for failed processes.

Associate Instructor - Hofstra University
Amazon Top 750 reviewer - Blog - Unresolved References - Book Review Blog
kumar abhay
Ranch Hand

Joined: Oct 02, 2001
Posts: 53
it was nice that u replied but could u plz make that more clear so that i could take it more easy.i hope this wont bother u ppl.
thanks in advance
kumar abhay
Junilu Lacar

Joined: Feb 26, 2001
Posts: 6529

Kumar, the System.exit() method does one thing: it makes the following invocation:
Now please, don't ask what that statement does. If you really want to know, open up the $java/src.jar (see note below) and trace through the code yourself. It will be a good learning experience for you.
Note: replace "$java" with the full path of the directory where you installed Java.
I agree. Here's the link:
subject: asking about system.exit()
It's not a secret anymore!