Java 围绕锁的同步语句

Question

我想知道是否

synchronize (lock) {
    ... 
}

其中lock是java.util.concurrent.locks.Lock的实例，将lock像任何其他对象或try-finally习惯用法一样对待，即

 lock.lock(); 
 try {
     ... 
 } finally { 
    lock.unlock();
 }

Answer 1

Lock documentation :

Note that Lock instances are just normal objects and can themselves be used as the target in a synchronized statement. Acquiring the monitor lock of a Lock instance has no specified relationship with invoking any of the lock() methods of that instance. It is recommended that to avoid confusion you never use Lock instances in this way, except within their own implementation.

所以基本上，它被视为任何其他对象。并且，不要这样做。