ReentrantLock 线程安全锁的机制

1 具有线程锁的安全机制
2 可以在各个线程抢占时，线程之间切换更加频繁
代码如下

package com.exception2;

import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;

class Ex4 implements  Runnable  {
    private int taks=100;
    private ReentrantLock lk=new ReentrantLock(true);
    @Override
    public void run() {
        while (true){
            try{
                lk.lock();
                if(taks>0){
                    try {
                        Thread.sleep(40);
                    }catch (Exception e){
                        e.printStackTrace();
                    }
                    System.out.println(Thread.currentThread().getName()+":"+taks--);
                }else {
                    break;
                }
            }finally {
                lk.unlock();
            }

        }
    }
}
public class Main4 {
    public static void main(String[] args) {
          Ex4 e=new Ex4();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();
        new Thread(e).start();

    }
}

private ReentrantLock lk=new ReentrantLock(true);
锁机制为true时 运行效果

private ReentrantLock lk=new ReentrantLock(false);//不写参数时候，默认也为false
锁机制为false时 运行效果

来源：CSDN

作者：风学长

链接：https://blog.csdn.net/zhang6132326/article/details/103687739