Main.java Source code

Introduction

Here is the source code for Main.java

Source

public class Main {
    public static void main(String[] args) {
        ThreadGroupDemo tg = new ThreadGroupDemo();
    }
}

class ThreadGroupDemo implements Runnable {
    public ThreadGroupDemo() {
        try {
            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();

            t1.join();
            t2.join();

            if (!cGroup.isDestroyed()) {
                cGroup.destroy();
            } else {
                System.out.println(cGroup.getName() + " destroyed");
            }

            // parent group destroyed
            if (!pGroup.isDestroyed()) {
                pGroup.destroy();
            } else {
                System.out.println(pGroup.getName() + " destroyed");
            }

        } catch (Exception ex) {
            System.out.println(ex.toString());
        }
    }

    public void run() {

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