ReenTrantLock簡單使用

ReenTrantLock簡單使用

/**
 * @ClassName:MReenTrantLock
 * @Description:TODO加入鎖，保證一次執行，同時也防止併發影響數據有效性
 * @Author:ZY
 * @Date:2019/6/24 0024 22:34
 * @Version:1.0
 **/
public class MReenTrantLock extends Thread {
    private static Integer num = 100;
    //爲true則是公平鎖
    private static Lock lock = new ReentrantLock(false);
    public void run () {
        for (int i = 0; i < 100; i++) {
            lock.lock();
            try {
                if (num == 0) {
                    break;
                }
                num--;
                System.out.println(num);
            } finally {
                lock.unlock();
            }
        }

    }

    public static void main(String[] args) {
        MReenTrantLock mReenTrantLock = new MReenTrantLock();
        for (int i = 0; i < 1000; i++) {
            Thread thread = new Thread(mReenTrantLock);
            thread.start();
        }
    }
}