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();
            }
        }
    }
}