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Wait()-The thread releases ownership of this monitor and waits until another thread notifies the monitor of the object by callingnotify()method ornotifyAll()method wakes up the thread. Then, the thread waits until it can regain ownership of the monitor and resume execution.
Sleep()-This method puts the currently executing thread into a sleep state (temporarily stops execution) for the specified number of milliseconds. The thread does not lose any ownership of monitors. It will send the current thread to the "unrunnable" state within the specified time.
| serial number | key | waiting | sleeping |
|---|---|---|---|
| 1 | class | The Wait() method belongs to the Object class | The Sleep() method belongs to the Thread class |
| 2 | Lock release | Wait() releases the lock on the object | It will not release the lock on the object |
| 3 | call context | You can call Wait() on the object itself | You can call Sleep() on the thread |
| 4. | wake-up condition | until the callnotify(),notifyAll()from the object | until at least the time expires or the call is interrupted |
| 5 | False wake-up | The program may cause a false wake-up | It will not cause a false wake-up. |
synchronized(lockedObject){
while(condition == true){
lockedObject.wait() //releases lockedObject lock
{}
Thread.sleep(100); //puts current thread on Sleep
{}