JAVA并发，后台线程

 package com.xt.thinks21_2;

 import java.util.concurrent.TimeUnit;

 /**
  * 后台线程测试
  *
  * @author Administrator
  *
  */
 public class SimpleDaemonTest implements Runnable {

     @Override
     public void run() {
         // TODO Auto-generated method stub
         while (true) {
             try {
                 TimeUnit.MILLISECONDS.sleep(100);
                 System.out.println(Thread.currentThread() + ":" + this);
             } catch (InterruptedException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }

     public static void main(String[] args) {
         for (int i = 0; i < 10; i++) {
             Thread t = new Thread(new SimpleDaemonTest());
             t.setDaemon(true);// 设置为后台线程，如果不设置则为非后台线程，会无线打印线程信息
             t.start();
         }
         System.out.println("ALL DEAMON IS START!");
         try {
             TimeUnit.MILLISECONDS.sleep(175);// 175>100，所有每个线程信息打印一次
         } catch (InterruptedException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }

 }

后台线程与非后台线程的方法区别:后台线程会主动设置Thread.setDeamon(true)

当非后台线程结束时，后台线程强制结束