Java multithreading: sleep and currentThread methods

Question

I'm new to concurrent programming in Java. I've noticed that the methods sleep() and currentThread() of the Thread class are static. Since with a multi-core CPU, many threads can run at the same time, I was wondering how the thread is chosen between the ones in execution. Thank you.

Answer 1

That's easily found in the Javadocs for Thread:

For currentThread():

Returns a reference to the currently executing thread object.

For sleep():

Causes the currently executing thread to sleep

I.e. the Thread that calls the method for both methods.