java线程池,信号量使用demo

直接上代码

package org.jimmy.threadtest20181121;

import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

public class TestThread20181128 {

    public Semaphore semaphore = new Semaphore(2, true);

    public static void main(String[] args) {
        try {
            TestThread20181128 testThread20181128 = new TestThread20181128();
            LinkedBlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>();
            ThreadPoolExecutor201811281311 executor = new ThreadPoolExecutor201811281311(2, 10000, 3600, TimeUnit.SECONDS, workQueue);
            for(int i = 0 ; i < 10; i++) {
                String id = i + "";
                Thread thread = new Thread(testThread20181128.new LineUpThread(id));
                executor.submit(thread);
            }
            executor.shutdown();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    class LineUpThread implements Runnable {

        private String id;

        public LineUpThread(String id) {
            this.id = id;
        }

        @Override
        public void run() {
            try {
                if(semaphore.availablePermits() > 0){
                    System.out.println("开始排队");
                }
                semaphore.acquire();
                System.out.println("轮到编号" + id + "的客户了,可以开始购票了!");
                System.out.println("编号" + id + "的客户已购票成功!");
                semaphore.release();
            } catch(Exception e) {
                e.printStackTrace();
            }
        }

    }

}

运行结果: