The difference between a Java daemon thread and a user thread

public class Daemontest {public    static void Main (string[] args) {        new Workerthread (). Start ();        try {            thread.sleep (7500);        } catch (Interruptedexception e) {}        System.out.println ("Main Thread Ending");    }}class Workerthread extends Thread {public    workerthread () {        Setdaemon (true);   When false, (i.e. when it's a user thread),                //The Worker thread continues to run.                When True, (i.e. when it's a daemon thread),                //The Worker thread terminates when the main                 //thread Terminat Es.    }    public void Run () {        int count=0;        while (true) {            System.out.println ("Hello from Worker" +count++);            try {                sleep ()            } catch (Interruptedexception e) {}}        }}    

Simply understood: The daemon does not prevent the JVM from shutting down. The JVM cannot shut down when a user thread is running. When no user thread is running, there is no daemon thread, and the JVM shuts down.

Daemon Threading Application Example: Java garbage collection. When no thread is running, garbage is not generated and garbage collection does not work, and the JVM can shut down.

Daemon threads Apply background: Background threads (such as threads that can collect certain system state, send email threads, etc. that do not want to affect the JVM)

The difference between a Java daemon thread and a user thread