目錄

1.ReentrantLock

2.ReentrantLock的實現

3.synchronized和ReentrantLock的區別

九、ReentrantLock（公平鎖）

1.ReentrantLock

2.ReentrantLock的實現

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();
    }
}

只有當ReentrantLock構造中傳入為true時才是公平鎖

3.synchronized和ReentrantLock

的區別

Java多線程和並發（九），ReentrantLock（公平鎖）