Friday, September 17, 2010

JVM Shutdown Hook

Suppose our Java application receives a SIGINT or SIGKILL signal and we need to do something before the JVM terminates. Java provides a way to add a shutdown hook into the JVM.
public class Main {

    static {
        Runtime.getRuntime().addShutdownHook(new Thread() {
            public void run() {
                System.out.println("Bye, bye JVM :(");
    public static void main(String[] args) {
        System.out.println("Doing something....");
        try {
        } catch (Exception e) {
Make sure to add the shutdown hook in the static block.

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