public class ExtendThread {
    public static void main(String arg[]){
        new NewThreadTwo();
        try{
            for(int i = 5; i > 0; i--){
                System.out.println("Main Thread:" + i);
                Thread.sleep(1000);
            }
        }catch (InterruptedException e){
            System.out.println("Main interrupted.");
        }
        System.out.println("Exiting main");
    }
}
class NewThreadTwo extends Thread {
    NewThreadTwo(){
        super("Demo Thread");
        System.out.println("Child Thread:" + this);
        start();
    }
    public void run(){
        try{
            for(int i = 5; i > 0; i--){
                System.out.println("Child Thread:" + i);
                Thread.sleep(500);
            }
        }catch (InterruptedException e){
            System.out.println("Child interrupted.");
        }
        System.out.println("Exiting child thread.");
    }
}