Scheduledexecutorservice timer

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class TestDamo {
    
    public static void main(String[] args){
        //ScheduledExecutorService  Internal thread pool   Make up for Timer The defects of 
        ScheduledExecutorService pool = Executors.newScheduledThreadPool(3);
        pool.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                System.out.println(Thread.currentThread()+" Do it once ");
            }
        },0,2, TimeUnit.SECONDS);
    }
}

ScheduledExecutorService  Internal thread pool   Make up for Timer The defects of