How does Thread.sleep() work when called from multiple threads

Question

sleep() is a static method of class Thread. How does it work when called from multiple threads. and how does it figure out the current thread of execution. ?

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Answer 1

a more generic Question would be How are static methods called from different threads ? Won't there be any concurrency problems ?

There is only a potential concurrency problem if one or more thread modifies shared state while another thread uses the same state. There is no shared state for the sleep() method.