Timer Task in java?
I have to do the timertask in java. The scenario is: I have to schedule a task for some delay intially. 开发者_开发百科If i have clicked a button it will cancel the current Timer and then it will reschedule it. How to implement it in java?
when i have used the cancel()
i can not access the timer again. that is i can not reuse that object. i have declared the Timer
and Timertask
as static.
Thanks in Advance.
The easiest way I can think of implementing that is using an Executor.
Let's say you want to schedule a task to run in 30 seconds:
ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
scheduler.schedule(new Task(), 30, TimeUnit.SECONDS);
Task
must be a class implementing Runnable
interface:
class Task implements Runnable
{
public void run()
{
// do your magic here
}
}
If you need to halt execution of your task, you can use shutdownNow
method:
// prevents task from executing if it hasn't executed yet
scheduler.shutdownNow();
As long as they are not declared as final
, just create new instances.
There is also Quartz API for this purpose. It would give you more flexibility in clustered env.
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