在java中提供有关wait和sleep的详细信息

Question

我需要java中的wait和sleep方法之间的确切区别。请详细说明上述方法。

Answer 1

<强>睡眠（）：     它是Thread类的静态方法。它使当前线程进入＆＃34; Not Runnable＆＃34;指定时间的状态。在此期间，线程会保留已获取的锁定（监视器）。

wait（）：这是Object类的一个方法。它使当前线程进入＆＃34; Not Runnable＆＃34;州。在对象上调用Wait，而不是在线程上调用。在调用wait（）方法之前，对象应该是同步的，意味着对象应该在synchronized块内。对wait（）的调用释放获取的锁。 的例如

synchronized(LOCK) {   
    Thread.sleep(1000); // LOCK is held
}

synchronized(LOCK) {   
    LOCK.wait(); // LOCK is not held
}

让我们对以上各点进行分类：

致电：

wait(): Call on an object; current thread must synchronize on the lock object.
sleep(): Call on a Thread; always currently executing thread.

同步：

wait(): when synchronized multiple threads access same Object one by one.
sleep(): when synchronized multiple threads wait for sleep over of sleeping thread.

保持锁定：

wait(): release the lock for other objects to have chance to execute.
sleep(): keep lock for at least t times if timeout specified or somebody interrupt.

唤醒条件：

wait(): until call notify(), notifyAll() from object
sleep(): until at least time expire or call interrupt().

用法：

sleep(): for time-synchronization and;
wait(): for multi-thread-synchronization.