Java多线程和并发（九），ReentrantLock（公平锁）

目录

1.ReentrantLock

2.ReentrantLock的实现

3.synchronized和ReentrantLock的区别

九、ReentrantLock（公平锁）

1.ReentrantLock

 

2.ReentrantLock的实现

public class ReentrantLockDemo implements  Runnable{
    private static ReentrantLock lock = new ReentrantLock(true);
    @Override
    public void run(){
        while (true){
            try{
                lock.lock();
                System.out.println(Thread.currentThread().getName() + " get lock");
                Thread.sleep(1000);
            } catch (Exception e){
                e.printStackTrace();
            } finally {
                lock.unlock();
            }
        }
    }
    public static void main(String[] args) {
        ReentrantLockDemo rtld = new ReentrantLockDemo();
        Thread thread1 = new Thread(rtld);
        Thread thread2 = new Thread(rtld);
        thread1.start();
        thread2.start();
    }
}

只有当ReentrantLock构造中传入为true时才是公平锁

3.synchronized和ReentrantLock的区别