<>JAVA Multithreading —— Daemons

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Threads are divided into user threads ( as main thread ) And Daemons

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The virtual machine must ensure that the user thread execution is complete

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Virtual machines don't have to wait for the daemons to finish

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The role of Daemons : Background record operation , journal , Monitor memory , garbage collection , Waiting mechanism, etc
package com.peng.demon04; // Test Daemons public class TestDaemon { public static void
main(String[] args) { Gad gad = new Gad(); You you = new You(); // Set as a daemon
Thread thread= new Thread(gad);// agent thread.setDaemon(true);// The default is false Represents a user thread
thread.start(); new Thread(you).start(); } } // lord Daemons class Gad implements
Runnable{ @Override public void run() { while (true){ System.out.println(" God is always there "
); } } } // you User thread As long as the user thread ends , The virtual machine stops , But it will take time to stop , So we'll run the daemons for a while class You implements
Runnable{ @Override public void run() { for (int i = 0; i < 30000; i++) { System
.out.println(" Live happily "); } System.out.println("goodbey world"); } }

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