Java并发-ThreadGroup获取所有线程

 1 public Thread[] findAllThread(){
 2   ThreadGroup currentGroup =Thread.currentThread().getThreadGroup();
 3 
 4   while (currentGroup.getParent()!=null){
 5       // 返回此线程组的父线程组
 6       currentGroup=currentGroup.getParent();
 7   }
 8   //此线程组中活动线程的估计数
 9   int noThreads = currentGroup.activeCount();
10 
11   Thread[] lstThreads = new Thread[noThreads];
12   //把对此线程组中的所有活动子组的引用复制到指定数组中。
13   currentGroup.enumerate(lstThreads);
14 
15   for (Thread thread : lstThreads) {
16       System.out.println("线程数量："+noThreads+" 线程id：" + thread.getId() + " 线程名称：" + thread.getName() + " 线程状态：" + thread.getState());
17   }
18   return lstThreads;
19 }