Java多线程之Join方法阻塞线程

 package org.study2.javabase.ThreadsDemo.status;

 /**
  * @Auther:GongXingRui
  * @Date:2018/9/19
  * @Description: 阻塞进程方法Join
  **/
 public class ThreadJoin {
     public static void main(String args[]) throws InterruptedException {
         JoinDemo demo = new JoinDemo();
         Thread t = new Thread(demo);
         t.start();

         for (int i = 0; i < 21; i++) {
             if (i == 10) {
                 // 阻塞main进程，执行线程
                 t.join();
             }
             System.out.println("main执行中: " + i);
             Thread.sleep(100);
         }
     }
 }

 class JoinDemo implements Runnable {
     @Override
     public void run() {
         for (int i = 0; i < 21; i++) {
             System.out.println("线程执行中: " + i);
             try {
                 Thread.sleep(100);
             } catch (InterruptedException e) {
                 e.printStackTrace();
             }
         }
     }
 }