簡單安全高效的Java計數器

本文利用AtomicLong實作了一個安全高效的計數器，利用線程池技術，測試結果符合預期，避免了線程并發操作變量問題，避免使用同步鎖提高了效率。

package com.springapp.mvc;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicLong;

/**
 * Created by acer on 2017/5/27.
 */
public class TestAtomic {
    //AtomicLong 的api參考 http://www.tuicool.com/articles/uY3qIbB
    public static final AtomicLong atomicLong = new AtomicLong(0L);

    public static void main(String[] args) {
        ExecutorService executorService = Executors.newFixedThreadPool(10);
        MyThread myThread = null;
        for(int i = 0;i<100;i++){
            myThread = new MyThread(atomicLong);
            //ExecutorService的api中文解釋【啟動一次順序關閉，執行以前送出的任務，但不接受新任務】 http://tool.oschina.net/apidocs/apidoc?api=jdk-zh
            executorService.submit(myThread);
        }
        executorService.shutdown();
        System.out.println(atomicLong.get());
    }
}


class MyThread extends Thread {
    private AtomicLong atomicLong;

    public MyThread(AtomicLong atomicLong){
        this.atomicLong = atomicLong;
    }

    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName() + "正在執行。。。");
        System.out.println(atomicLong.incrementAndGet());
    }
}