Timer.cancel()

下面是我写的一个测试代码：

public class TimerDemo
{

    private Timer timer;
    private TimerTask timerTask;

    public void doTask()
    {
        timer = new Timer();
        timerTask = new TimerTask()
        {

            public void run()
            {
                System.out.println("before timer cancle");
                //timer.cancel();//注释掉看schedule是否工作，与不注释作对比
                System.out.println("after timer cancle");
            }
        };
        timer.schedule(timerTask, 0, 5 * 1000);
    }

    public static void main(String[] args)
    {
        TimerDemo demo = new TimerDemo();
        demo.doTask();
    }
}