java - How long a thread wait while other thread accessing synchronized block?

Question

Threads can wait until other threads release lock which accessing synchronized block. I would like to know how long a thread can wait while other thread accessing synchronized block? and when will it come to know that the other thread released lock?

Answer 1

如果变量lock已在一个线程中同步，则所有其他尝试用于lock同步的线程将被阻塞，直到lock不再同步。

//all other threads waiting on thread 1...
synchronized(lock)
{
    //thread 1 storing digits of pi into linked list... or whatevs.
}

正如其他人所说，线程将无限期地等待变量变得空闲以进行同步。