JUC-12.3-线程的调度

 

 

package com.wf.zhang.juc;

import java.util.Random;
import java.util.concurrent.*;

/**
 * 三、工具类 : Executors
 * *** ScheduledExecutorService newScheduledThreadPool() : 创建固定大小的线程，可以延迟或定时的执行任务。
 */
public class TestScheduledThreadPool {
    public static void main(String[] args) throws ExecutionException, InterruptedException {

        ScheduledExecutorService pool = Executors.newScheduledThreadPool(5);

        for (int i = 0; i < 5; i++) {
            Future<Integer> result = pool.schedule(new Callable<Integer>() {
                @Override
                public Integer call() throws Exception {
                    //生成100以内随机数
                    int num = new Random().nextInt(100);
                    System.out.println(Thread.currentThread().getName() + " " + num);
                    return num;
                }
            }, 3, TimeUnit.SECONDS); //每三秒执行
            System.out.println(result.get());
        }
        pool.shutdown();
    }
}

 

结果