Why wait(), notify(), notifyAll() methods are in Object class instead of Thread class?

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Q1. Why wait(), notify(), notifyAll() methods are in Object class instead of Thread class?

Ans. wait() and notify() methods are defined in Object class rather than Thread class.If wait() and notify() were on the Thread instead then each thread would have to know the status of every other thread and there is no way to know thread1 that thread2 was waiting for any resource to access.Hence, notify, wait, notifyAll methods are defined in object class in Java.

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