请问Timer定时器的用法

 Timer timer = new Timer("Timer-reconnect provider Timer"); TimerTask task = new TimerTask() {    @Override    public void run() {        log.info("it is time to check jtapi Provider.");        try {            checkProvider();        } catch (Exception e) {            log.info("the Network may be disconnected,please check!");            e.printStackTrace();        }    }}

    @Override    public void providerInService(ProviderEvent event) {        log.info("provider is InService.");                timer.cancel();    }    @Override    public void providerOutOfService(ProviderEvent event) {        log.info("provider is OutOfService,please wait for InService.");                timer.schedule(task, 3000, 10000);    }    @Override    public void providerShutdown(ProviderEvent event) {        log.info("provider is Shutdown，please wait for restart.");                timer.schedule(task, 3000, 10000);    }