java.util.Timer类简单实例

public class StatTimer {

    private Timer timer;

    public StatTimer() {

        timer = new Timer();

        timer.schedule(new TimerTask() {
            // 执行的方法
            public void run() {
                System.out.println(new Date().toString());
            }

        }, 0, 1000);

    }

    public void destroy() {
        timer.cancel();
    }

    public static void main(String[] args) {

        StatTimer st = new StatTimer();

        new Thread() {
            public void run(StatTimer st) {
                try {
                    sleep(3000);
                    st.destroy();
                    System.out.println("结束计时！");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

            }
        }.run(st);

    }

} 

用Thread类实现（据说用Timer类不好）

public class StatTimer {

    private static Log log = new Log(StatTimer.class);

    public static long request = 0;

    private static Thread thread;

    private static boolean runFlag = true;

    public static void start() {

        thread = new Thread() {
            public void run() {
                try {

                    long time = new Date().getTime();
                    long interval = 1000;
                    if (time % interval != 0) {
                        sleep(interval - time % interval);
                        time += interval - time % interval;
                    }

                    while (runFlag) {
                        sleep(interval);
                        time += interval;
                        System.out.println(new Date(time).getTime() + "/"
                                + new Date().getTime());

                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                    // log.exception(e);
                }

            }
        };

        thread.start();

    }

    public static void destroy() {
        runFlag = false;
        if (!thread.isInterrupted())
            thread.interrupt();
    }

    public static void main(String[] args) {

        StatTimer.start();

        new Thread() {
            public void run() {
                try {
                    sleep(3000);
                    StatTimer.destroy();
                    System.out.println("结束计时！");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

            }
        }.start();

    }
}