java 中Thread.join()的使用方法

import java.util.concurrent.TimeUnit;public class Join { public static void main(String[] args) throws Exception {  Thread previous = Thread.currentThread();  for (int i = 0; i < 10; i++) {   // 每个线程拥有前一个线程的引用，需要等待前一个线程终止，才能从等待中返回   Thread thread = new Thread(new Domino(previous), String.valueOf(i));   thread.start();   previous = thread;  }  TimeUnit.SECONDS.sleep(5);  System.out.println(Thread.currentThread().getName() + " terminate."); } static class Domino implements Runnable {  private Thread thread;  public Domino(Thread thread) {   this.thread = thread;  }  public void run() {   try {    thread.join();   } catch (InterruptedException e) {   }   System.out.println(Thread.currentThread().getName() + " terminate.");  } }}