手工创建一个线程池

手工创建一个线程池，执行callable任务

 

/**
 * @Information:
 * @Author: HeHaoYuan
 * @Date: Created at 13:48 on 2019/8/12
 * @Package_Name: PACKAGE_NAME
 */
import java.util.concurrent.*;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class MyExecutorService implements Callable {
    int tick = 200;
    private Lock lock = new ReentrantLock();

    @Override
    public String call() throws Exception {
        for (int i = 0; i < 200; i++) {
            lock.lock();
            if (tick > 0) {
                TimeUnit.MILLISECONDS.sleep(20);
                System.out.println(Thread.currentThread().getName()+"票还剩下" + tick-- + "张");
                lock.unlock();
            }
        }
        return "票已经卖完";
    }
}
class ExecutorTest {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        MyExecutorService thread1 = new MyExecutorService();

        /**

         * 核心线程池的大小是：3

         * 线程池的最大数量：5

         * 空闲线程的存活时间：2000

         * 空闲线程的存活时间的单位：ms

         * 工作队列：基于链表结构的阻塞队列

         * 饱和策略：没有声明默认采用AbortPolicy （无法处理新任务抛出异常）

         */
        ExecutorService executorservice =
                new ThreadPoolExecutor(8,12,
                        2000,TimeUnit.MILLISECONDS,
                        new LinkedBlockingDeque<>());

        Future future = executorservice.submit(thread1);
        Future future2 = executorservice.submit(thread1);
        Future future3 = executorservice.submit(thread1);
        Future future4 = executorservice.submit(thread1);
        Future future5 = executorservice.submit(thread1);
        future.get();
        future2.get();
        future3.get();
        future4.get();
        future5.get();

        //关闭线程池
        executorservice.shutdown();
    }
}

执行结果：