当Java程序突然退出时，是否可以执行某些操作？

Question

I need to record an log if the program exited abruptly or with any exception. For example, when someone presses Ctrl+C while running program, I need to log that it exited abruptly. How can I do this?

Answer 1

You can try and use a shutdown hook for this. From the documentation, the hook will be executed under the following circumstances:

• The program exits normally
• The VM is terminated

This covers your ^C situation, but will doubtfully cover situations like the machine being unplugged (barring some sort of redundant hardware on the machine).

Here are some notes about the design.

Crude example:

Runtime.getRuntime().addShutdownHook(new Thread() {
    @Override
    public void run() {
        System.out.println("System was shutdown");
    }
});