Java计时器

您不能像在此处那样重复使用TimerTask。

计时器的相关部分：

private void sched(TimerTask task, long time, long period) {    if (time < 0)        throw new IllegalArgumentException("Illegal execution time.");    synchronized(queue) {        if (!thread.newTasksMayBeScheduled) throw new IllegalStateException("Timer already cancelled.");        synchronized(task.lock) { //Right here's your problem. //  state is package-private, declared in TimerTask if (task.state != TimerTask.VIRGIN)     throw new IllegalStateException(         "Task already scheduled or cancelled"); task.nextExecutionTime = time; task.period = period; task.state = TimerTask.SCHEDULED;        }        queue.add(task);        if (queue.getMin() == task) queue.notify();    }}

您需要重构代码，以便创建新的TimerTask，而不是重复使用它。