Java线程池

import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

@Slf4j
public class ThreadPoolExample {
    public static void main(String[] args) {
       // ExecutorService executorService= Executors.newCachedThreadPool();
       // ExecutorService executorService=Executors.newSingleThreadExecutor();
        //ExecutorService executorService=Executors.newFixedThreadPool(3);
        ExecutorService executorService=Executors.newScheduledThreadPool(3);
        executorService.schedule(new Runnable(){
            @Override
            public void run(){
                 log.warn("schedule run");
            }
        },3, TimeUnit.SECONDS);
        //延迟一秒每隔一秒执行
        executorService.scheduleAtFixedRate(new Runnable(){
            @Override
            public void run(){
                log.warn("schedule run");
            }
        },1,3,TimeUnit.SECONDS);

        Timer timer=new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                log.warn("schedule run");
            }
        },new Date(),5*1000);

//        for(int i=0;i<10;i++){
//            final  int index=i;
//            executorService.execute(new Runnable() {
//                @Override
//                public void run() {
//                    log.info("task:{}",index);
//                }
//            });
//        }
        executorService.shutdown();
    }
}