Shut down hook

voidaddShutdownHook(Thread hook)Registers a new virtual-machine shutdown hook.
booleanremoveShutdownHook(Thread hook)De-registers a previously-registered virtual-machine shutdown hook.

public class Main {
  public static void main(String[] args) {
    Runtime runtime = Runtime.getRuntime();

    runtime.addShutdownHook(new Thread(){
      public void run(){
        System.out.println("Shut down");

The output:

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