守护线程
守护线程的例子搞的我很伤感,终有离世的一天,愿我们每天都能开心度过。
线程分为用户线程(main线程)和守护线程(gc 垃圾回收线程)
虚拟机必须确保用户线程执行完毕
虚拟机不用等待守护线程执行完毕
守护线程例子:后台记录操作日志、监控内存、垃圾回收等等
例子:
package com.example.multi_thread;
public class TestDaemon {
public static void main(String[] args) {
God god = new God();
You1 you1 = new You1();
Thread thread = new Thread(god);
thread.setDaemon(true);
thread.start();
new Thread(you1).start();
}
}
class God implements Runnable {
@Override
public void run() {
while (true) {
System.out.println("God bless you!");
}
}
}
class You1 implements Runnable {
@Override
public void run() {
System.out.println("Hello World!");
for (int i = 0; i < 36500; i++) {
System.out.println("Happy Day~");
}
System.out.println("Bye world!");
}
}