class ExampleShutdownHook 
{
    public static void main(String[] args) 
    {
        // Java code to install shutdown hook: MyShutdown
        MyShutdown sh = new MyShutdown();
        Runtime.getRuntime().addShutdownHook(sh);
        // Do the Joone stuff
        //   .
        //   .
        //   .
    }
}

// Example shutdown hook class
class MyShutdown extends Thread 
{
    public void run() 
    {
        System.out.println("MyShutdown hook called");
        // Dump the shutdown file
        //    .
        //    .
        //    .
    }
}