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notify vs notifyAll

 
P Ventura
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Please, someone clarify differences between notify and notifyAll.
I can't understand, they're similar!
 
Kelvin Chenhao Lim
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More than one thread can wait on an object at any given time. When you call an object's notify() method, only one of those waiting threads will be woken (and you can't choose which one). On the other hand, if you call an object's notifyAll() method, all of those waiting threads will be woken.
 
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