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Java™ Platform Standard Ed. 6 |
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java.lang.Object extended by java.util.TimerTask
A task that can be scheduled for one-time or repeated execution by a Timer.
Timer
Constructor Summary | |
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protected |
TimerTask()
Creates a new timer task. |
Method Summary | |
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boolean |
cancel()
Cancels this timer task. |
abstract void |
run()
The action to be performed by this timer task. |
long |
scheduledExecutionTime()
Returns the scheduled execution time of the most recent actual execution of this task. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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protected TimerTask()
Method Detail |
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public abstract void run()
Thread.run()
public boolean cancel()
Note that calling this method from within the run method of a repeating timer task absolutely guarantees that the timer task will not run again.
This method may be called repeatedly; the second and subsequent calls have no effect.
public long scheduledExecutionTime()
This method is typically invoked from within a task's run method, to determine whether the current execution of the task is sufficiently timely to warrant performing the scheduled activity:
public void run() { if (System.currentTimeMillis() - scheduledExecutionTime()>= MAX_TARDINESS) return; // Too late; skip this execution. // Perform the task }This method is typically not used in conjunction with fixed-delay execution repeating tasks, as their scheduled execution times are allowed to drift over time, and so are not terribly significant.
Date.getTime()
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Java™ Platform Standard Ed. 6 |
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