Java ThreadGroup.getParent()

public final ThreadGroup getParent()

//from   www. j a va  2  s. co m
public class Main {
  public static void main(String[] args) {
    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("ParentThreadGroup for " + pGroup.getName() + " is "
        + pGroup.getParent().getName());
    System.out.println("ParentThreadGroup for " + cGroup.getName() + " is "
        + cGroup.getParent().getName());

  }

  public void run() {

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