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Is there any way to check if a given thread is sleeping?
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You can call Thread. getState() on and check if the state is TIMED_WAITING . Note, however that TIMED_WAITING doesn't necessarily mean that the thread called sleep() , it could also be waiting in a Object.
A thread is alive or running if it has been started and has not yet died. To check whether a thread is alive use the isAlive() method of Thread class. It will return true if this thread is alive, otherwise return false .
If it is a UI worker thread, as long as they have some kind of progress indicator, anywhere up to half a second should be good enough. The UI should be responsive during the operation since its a background thread and you definitely have enough CPU time available to check every 500 ms.
Thread. sleep causes the current thread to suspend execution for a specified period. This is an efficient means of making processor time available to the other threads of an application or other applications that might be running on a computer system.
You can call Thread.getState() on and check if the state is TIMED_WAITING.
Note, however that TIMED_WAITING doesn't necessarily mean that the thread called sleep(), it could also be waiting in a Object.wait(long) call or something similar.
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