ThreadPoolExecutor线程池问题

悬赏园豆：20 [已解决问题] 解决于 2017-11-08 16:22

最近学习了线程池，写了个小demo，代码如下：

MyTask.java:

package cn.ccsu.concurrent.pool;

public class MyTask implements Runnable {

    private int taskNum;

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

    @Override
    synchronized public void run() {

        System.out.println("线程 " + this.taskNum + " 正在执行任务!!");
        /*try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }*/
        System.out.println("线程 " + this.taskNum + " 执行完毕");
    }

}

ThreadPoolExecutorTest.java:

package cn.ccsu.concurrent.pool;

import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.junit.Test;

public class ThreadPoolExecutorTest {

    @Test
    public void test() throws InterruptedException, ExecutionException {
        /*
         * public ThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long
         * keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue)
         */

        System.out.println("\nThreadPoolExecutorTest");
        ThreadPoolExecutor pool = new ThreadPoolExecutor(10, 14, 500, TimeUnit.MINUTES,
                new LinkedBlockingQueue<Runnable>());

        int taskNum = 20;
        for (int i = 0; i < taskNum; i++) {
            Future<?> f = pool.submit(new MyTask(i));
//            System.out.println(i+":"+f.get());
        }
        System.out.println("线程池中线程数目：" + pool.getPoolSize() + "，队列中等待执行的任务数目：" + pool.getQueue().size() + "，已执行完的任务数目："
                + pool.getCompletedTaskCount());

        pool.shutdown();

    }

}