Difference between wait() and sleep()

Question

What is the difference between a wait() and sleep() in Threads?

Is my understanding that a wait()-ing Thread is still in runni

Answer 1

1. wait() is a method of Object class.
   sleep() is a method of Thread class.

2. sleep() allows the thread to go to sleep state for x milliseconds.
   When a thread goes into sleep state it doesn’t release the lock.

3. wait() allows thread to release the lock and goes to suspended state.
   This thread will be active when a notify() or notifAll() method is called for the same object.