public abstract class TimerTask

The TimerTask class represents a task to run at a specified time. The task may be run once or repeatedly.

TimerTask代表了一个在特定时间运行的任务。该任务可能运行一次或多次。

boolean	cancel() Cancels the TimerTask and removes it from the Timer's queue.
abstract void	run() The task to run should be specified in the implementation of the run() method.
long	scheduledExecutionTime() Returns the scheduled execution time.