How to use Timer class to call a method, do something, reset timer, repeat?

Question

I\'m a Java beginner and have been futzing around with various solutions to this problem and have gotten myself kind of knotted up. I\'ve tried with Threads and then discove

Answer 1

If you don't want to use timer class and can use Quartz then perform it like. My main class would be

import com.google.common.util.concurrent.AbstractScheduledService;
import org.quartz.CronScheduleBuilder;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.impl.StdSchedulerFactory;
import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import static org.quartz.TriggerBuilder.newTrigger;

import java.util.concurrent.CountDownLatch;

public class Test {


    public static void main(String[] args) throws Exception{


        CountDownLatch latch = new CountDownLatch(1);


        //do schdeuling thing
        JobDetail job = JobBuilder.newJob(SimpleJob.class).withIdentity(
                "CronQuartzJob", "Group").build();

        // Create a Trigger that fires every 5 minutes.
        Trigger trigger = newTrigger()
                .withIdentity("TriggerName", "Group")
                .withSchedule(CronScheduleBuilder.cronSchedule("0/1 * * * * ?"))
                .build();

        // Setup the Job and Trigger with Scheduler & schedule jobs
        final Scheduler scheduler = new StdSchedulerFactory().getScheduler();
        scheduler.start();
        scheduler.scheduleJob(job, trigger);

        //
        latch.await();

        Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    scheduler.shutdown();
                    latch.countDown();
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        }));

    }






}

and job class would be

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class SimpleJob implements Job {


    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        System.out.println("executing task!");
    }


}

I would create a executable jar for this and start this using java -jar .. & and Ctrl+C can stop that process , If you want it in background disownit