Java – wait(), notify() – which thread is unlocked first?

Try to understand wait() and notify() I know when thread a enters wait (). It will be awakened by notify () from other threads

But what happens if threads a, B, c enter wait () in the order represented? Who will be awakened by notify()? According to my experiment, a thread will be awakened first Am I right?

Does this mean that the system knows the order in which threads enter wait()?

Solution

From the document of notify (), emphasize my:

Other APIs (such as semaphore) have the concept of "fairness", so you can ensure that threads continue in the order they block