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Feb 6, 2010 · Any thread created by main thread, which runs main method in Java is by default non daemon because Thread inherits its daemon nature from the Thread which creates it i.e. parent Thread and since main thread is a non daemon thread, any other thread created from it will remain non-daemon until explicitly made daemon by calling setDaemon(true).
Aug 15, 2011 · Daemon threads in Java are like a service providers for other threads or objects running in the same process as the daemon thread. Daemon threads are used for background supporting tasks and are only needed while normal threads are executing. If normal threads are not running and remaining threads are daemon threads then the interpreter exits.
Feb 16, 2018 · I think you misunderstand what a daemon thread is. See what is a daemon thread in java. In summary, it basically means that a daemon thread shouldn't be doing any I/O or holding any resources. If you are contravening this basic rule then your thread doesn't qualify being a daemon thread.
By subclassing Runnable, you can get the resulting DaemonThread from the above Factory to perform the entire runnable unit within a separately spawned non-daemon Thread. Under normal circumstances this non-daemon Thread will complete even though the Daemon Thread used in the Executor is earmarked to be closed. Here's a little example:
A user thread is a thread that is created by the application (user), and, in most cases, a daemon thread is created by the Java VM to serve the user threads. The VM differentiates between threads, being user or daemon, when a user thread exits.
Mar 13, 2017 · Marks this thread as either a daemon thread or a user thread. The Java Virtual Machine exits when the only threads running are all daemon threads. This method must be called before the thread is started. A good example for a deamon thread is a timer. It makes no sense that a timer fires one more time if there are no user threads anymore.
Mar 7, 2011 · From Oracle documentation When a Java Virtual Machine starts up, there is usually a single non-daemon thread (which typically calls the method named main of some designated class). The Java Virtual Machine continues to execute threads until either of the following occurs: •The exit method of class Runtime has been called and the security manager has permitted the exit operation to take place.
Some Examples of Daemon Thread Services: Garbage collection in Java, Word count checker in MS Word, Auto-saver in medium, File downloads counter in a parallel file downloads application, etc. Share Improve this answer
Sep 11, 2022 · Daemon thread is a low priority thread (in context of JVM) that runs in background to perform tasks such as garbage collection (gc) etc., they do not prevent the JVM from exiting (even if the daemon thread itself is running) when all the user threads (non-daemon threads) finish their execution.
Jun 10, 2011 · A daemon thread is a thread, that does not prevent the JVM from exiting when the program finishes but the thread is still running. Daemon threads are service providers for other threads running in the same process as the daemon thread. E.g Garbage Collection. You can explicitly specify a thread created by a user thread to be a daemon thread by ...
