import java.io.*;

public class Dummy...{
    public static Dummy xyz = null;

    private boolean stopped = false;
    public static PrintWriter pw;

    public Dummy() throws IOException ...{
        pw = new PrintWriter(new OutputStreamWriter(
            new FileOutputStream("C:\\dummy.log")), true);
    }

    public void start() ...{
        pw.println("started");
        while(!stopped) ...{
            synchronized(this) ...{
                try ...{
                    wait();
                } catch (InterruptedException ie) ...{}
            }
        }
        pw.println("stopped");

    }

    public void stop() ...{
        pw.println("stopping");
        synchronized(this) ...{
            stopped = true;
            notifyAll();
        }
        try ...{
            Thread.sleep(1000);
        } catch(Exception ex)...{}
    }

    public static void main(String[] args) ...{
        try ...{
            xyz = new Dummy();
            Runtime.getRuntime().addShutdownHook(new Thread() ...{
                public void run() ...{
                pw.println("inside shutdown hook");
                    xyz.stop();
                }
            });
            xyz.start();
        } catch (Exception ex) ...{}
    }


    public static void shutdown() ...{
        xyz.stop();
    }
}