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Question

Start timers in Java

Answer 1

A:

You could use:

Thread.sleep(900000);
execute code...

The sleep() method takes milliseconds as arguments, therefore the huge number for your 15 minutes.

boutta 2009-02-26 06:52:32

u mean i need to have a class that extends httpservlet and implements runnable thread

2009-02-26 06:56:02

No, with Thread.sleep you tell the current thread to wait for a given amount of time. You don't need to implement anything.

boutta 2009-02-26 07:19:50

Answer 2

+3 A:

In Java 1.5 and above you can use the java.util.concurrent package

ScheduledExecutorService scheduler = Executors.newSingleThreadedScheduledExecutor();
ScheduledFuture<?> f = scheduler.schedule(new Runnable() {
    public void run() {
        //Code to be executed here
    }
}, 15L, TimeUnit.MINUTES);

You can cancel the execution thus:

f.cancel(false);

oxbow_lakes 2009-02-26 06:56:49

in the code where did u mention 15 minutes

2009-02-26 07:07:07

Your question says "5 minutes". If it's 15 I'll edit the code

oxbow_lakes 2009-02-26 07:16:47

I agree that Quartz is overkill. That is why I voted +1 on your answer. I still gave my answer for completeness

Nicolai 2009-02-26 07:45:29

Answer 3

+1 A:

The Quartz framework may also be helpful to you.

From their site:

Quartz is a full-featured, open source job scheduling system that can be integrated with, or used along side virtually any J2EE or J2SE application - from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple or complex schedules for executing tens, hundreds, or even tens-of-thousands of jobs; jobs whose tasks are defined as standard Java components or EJBs. The Quartz Scheduler includes many enterprise-class features, such as JTA transactions and clustering.

I have used this a lot for scheduling in different type of applications and have been very happy with it.

Nicolai 2009-02-26 06:58:34

Using Quartz is a bit heavy-handed for the answer to "I want to execute X in 5 minutes". I would only consider Quartz if I wanted cron-like execution, missed triggers, stateful execution etc etc

oxbow_lakes 2009-02-26 07:04:07

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