Example of a Shut Down Hook

Source:

public class ShutDownHook {

   public static void main(String[] args) {

      // try and run before shutdown
      Runtime.getRuntime().addShutdownHook(new Thread() {
         public void run() {
            System.out.println("Shutdown Hook is running....");
         }
      });

      try {
        System.out.println("Inside try");

        // throw  an exception
        int x = 10 / 0;

      } catch (Exception e) {
        System.out.println("Inside catch");
        // Shut down and test hook
        System.exit(0);

      } finally {
        // should not run
        System.out.println("Inside finally");
      }
   }
}

Output:

   $ java ShutDownHook 
   Inside try
   Inside catch
   Shutdown Hook is running....