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

In simple words, wait is wait Until some other thread invokes you whereas sleep is "dont execute next statement" for some specified period of time.

Moreover sleep is static method in Thread class and it operates on thread, whereas wait() is in Object class and called on an object.

Another point, when you call wait on some object, the thread involved synchronize the object and then waits. :)