protected TimerTask() 
{
        super();
}

Creates a new {@code TimerTask}.

 public boolean cancel() 
{
        synchronized (lock) {
            boolean willRun = !cancelled && when  > 0;
            cancelled = true;
            return willRun;
        }
}

Cancels the {@code TimerTask} and removes it from the {@code Timer}'s queue. Generally, it returns {@code false} if the call did not prevent a {@code TimerTask} from running at least once. Subsequent calls have no effect.

 long getWhen() 
{
        synchronized (lock) {
            return when;
        }
}

 boolean isScheduled() 
{
        synchronized (lock) {
            return when  > 0 || scheduledTime  > 0;
        }
}

 abstract public  void run()
The task to run should be specified in the implementation of the {@code run()}
method.

 public long scheduledExecutionTime() 
{
        synchronized (lock) {
            return scheduledTime;
        }
}

Returns the scheduled execution time. If the task execution is in progress it returns the execution time of the ongoing task. Tasks which have not yet run return an undefined value.

  void setScheduledTime(long time) 
{
        synchronized (lock) {
            scheduledTime = time;
        }
}