gistfile1.java

public class SchedulerTimerTask extends TimerTask {

    private final AtomicReference<Runnable> task = new AtomicReference<Runnable>( null );

    public SchedulerTimerTask(Runnable task) {
        this.task.set( task );
    }

    public void run() {

        Runnable delegate = this.task.get();

        if ( delegate != null ) {
            delegate.run();
        }

    }

    /**
     * Clear the reference to the runnable so it can be GCd
     */
    public void clear() {
        this.task.set( null );
    }

}