Shulou(Shulou.com)06/02 Report--

Today, I will talk to you about the difference between the daemon thread and the local thread in Java. Many people may not know much about it. In order to make you understand better, the editor has summarized the following content for you. I hope you can get something according to this article.

There are two types of threads in Java: daemon thread (Daemon) and user thread (User).

Any thread can be set as a daemon thread and a user thread through the method Thread.setDaemon (bool on); true sets the thread as a daemon thread and vice versa. Thread.setDaemon () must be called before Thread.start (), or the runtime will throw an exception.

The difference between the two:

The only difference is to determine when the virtual machine (JVM) leaves, Daemon is to provide services for other threads, if all the User Thread has been withdrawn, Daemon has no available threads, JVM leaves. It can also be understood that the daemon thread is the thread automatically created by JVM (but not necessarily), and the user thread is the thread created by the program; for example, the garbage collection thread of JVM is a daemon thread, when all threads have been evacuated and no longer generate garbage, the daemon thread naturally has nothing to do, and when the garbage collection thread is the only thread left on the Java virtual machine, the Java virtual machine will leave automatically.

Extension: the thread information printed by Thread Dump, the thread with the word daemon is the daemon, there may be: service daemon, compiled daemon, windows listening Ctrl+break daemon, Finalizer daemon, reference processing daemon, GC daemon.

After reading the above, do you have any further understanding of the difference between daemon threads and local threads in Java? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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