Running code on program exit in Java

Question

Is it possible to write a method that System.exit will call when you terminate a program?

Answer 1

Use Runtime.getRuntime().addShutdownHook(Thread).

Answer 2

Look into shutdown hooks, see http://docs.oracle.com/javase/8/docs/technotes/guides/lang/hook-design.html

Answer 3

You can add a VM shutdown hook.

Answer 4

You can use a shutdown hook.

http://download.oracle.com/javase/6/docs/api/java/lang/Runtime.html#addShutdownHook(java.lang.Thread)

Note that shutdown hooks will not run if the VM aborts abnormally or Runtime.halt(int) is called.

Answer 5

Shutdown hooks are the answer... here is an article on them. They do not come without issues (some of them are discussed in the article).