About Question com.enthuware.ets.scjp.v6.2.183 :

[piotrkmiotczyk]

I know the OS decides when it starts but isn't it the thread's run method implementation which usually decides for how much time it runs?

[admin]

No, actually, the programmer's code decides when a thread is started (when you call its start method) but only the JVM can decide how long and when a thread will actually get to run (before the thread's run method terminates, of course).
In other words, JVM cannot automatically start a thread and a programmer cannot tell when a thread will actually run.

HTH,
Paul.