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Core Java Interview Questions and Answers

Ques. What are the differences between the methods sleep() and wait()?
Ans.
  • The code sleep(1000); puts thread aside for exactly one second. The code wait(1000), causes a wait of up to one second. A thread could stop waiting earlier if it receives the notify() or notifyAll() call. 
  • The method wait() is defined in the class Object and the method sleep() is defined in the class Thread.
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