Java ThreadGroup.list()

public void list()

/*  w  ww  . j  a  va 2 s.c  o m*/
public class Main {
  public static void main(String[] args) {
    ThreadGroupDemo tg = new ThreadGroupDemo();
  }

}

class ThreadGroupDemo implements Runnable {
  public ThreadGroupDemo() {
    ThreadGroup pGroup = new ThreadGroup("Parent ThreadGroup");

    ThreadGroup cGroup = new ThreadGroup(pGroup, "Child ThreadGroup");

    Thread t1 = new Thread(pGroup, this);
    System.out.println("Starting " + t1.getName());
    t1.start();

    Thread t2 = new Thread(cGroup, this);
    System.out.println("Starting " + t2.getName());
    t2.start();

    System.out.println("Listing parentThreadGroup: " + pGroup.getName());
    pGroup.list();

    System.out.println("Listing childThreadGroup : " + cGroup.getName());
    cGroup.list();

  }

  public void run() {

    System.out.println(Thread.currentThread().getName()
        + " finished executing.");
  }
}