my statement (thread.setDaemon(true) means interrupt thread when main thread interrupted) is true?
setDaemon(true) whats mean?
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Out of interest - where did you get this information from? – Boris the Spider Sep 01 '19 at 07:18
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No, it means exactly what it says in the Javadoc. No more and no less. – user207421 Sep 01 '19 at 07:45
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Possible duplicate of [What is a daemon thread in Java?](https://stackoverflow.com/questions/2213340/what-is-a-daemon-thread-in-java) – Slaw Sep 01 '19 at 10:13
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No, it's not about interrupting. It's purely about whether the thread should prevent the JVM exiting.
The JVM will terminate when there are no "non-daemon" threads left alive. If you create a bunch of threads and then let the main thread finish, and you want the program to stay running due to those threads, they should not be daemon threads. If you want the new threads to be purely background threads, and you're happy for the program to finish when the main thread finishes, then they should be daemon threads.
Jon Skeet
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