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  • 关于java 线程池 ThreadPoolExceutor 之 TestDemo

    public class App {
    public static void main(String[] args) throws InterruptedException {
    System.out.println("这是测试项目");

    // ExecutorService executorService=Executors.newCachedThreadPool();
    // Executors.newSingleThreadExecutor();
    // Executors.newFixedThreadPool(100);
    ExecutorService executorService = Executors.newFixedThreadPool(5);

    // ThreadPoolExecutor executor = new ThreadPoolExecutor(5, 10, 200,
    // TimeUnit.MICROSECONDS,
    // new ArrayBlockingQueue<Runnable>(5));

    while (true) {
    for (int i = 0; i < 10; i++) {
    Mytask mytask = new Mytask(i);
    //executor.execute(mytask);
    executorService.execute(mytask);

    // System.out.println("线程池线程数目"+executor.getPoolSize()+"
    // 等待的任务数目"+executor.getQueue().size()
    // +",已执行完别的任务数目:"+executor.getCompletedTaskCount());

    System.out.println("当前线程活动数目:" + ((ThreadPoolExecutor) executorService).getActiveCount() + ",等待的任务数目:"
    + ((ThreadPoolExecutor) executorService).getTaskCount() + ",已执行完别的任务数目"
    + ((ThreadPoolExecutor) executorService).getCompletedTaskCount());
    }
    //executorService.shutdown();
    //executor.shutdown();
    System.out.println("主线程睡眠10秒 再执行~~~~~~~~~~~~~~~");
    Thread.sleep(10000);
    }
    }
    }

    -----------------------------------------------------------

    public class Mytask implements Runnable {
    private int taskNum;

    public Mytask(int num) {
    this.taskNum = num;
    }

    @Override
    public void run() {
    System.out.println("正在执行task" + this.taskNum);
    try {

    Thread.currentThread();
    Thread.sleep(4000);

    } catch (InterruptedException e) {

    e.printStackTrace();
    }
    System.out.println("task" + taskNum + "执行完毕");

    }

    }

    --------------------注解
     
    得到 ExecutorService 当前活动的线程数
     
    https://blog.csdn.net/yingzishizhe/article/details/8769907
     
    Java并发编程:线程池的使用(重点需要看)
     
    http://www.cnblogs.com/dolphin0520/p/3932921.html
     
    Java通过Executors提供四种线程池
     
    https://www.cnblogs.com/webglcn/p/5265901.html
     
    Executors创建的4种线程池的使用
     
    https://www.cnblogs.com/ljp-sun/p/6580147.html

     

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  • 原文地址:https://www.cnblogs.com/chengjun/p/9274945.html
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