Two methods of Thread implementation

thread-impl.java

class ThreadOne extends Thread {
    public void run(){
        for (int i = 0; i < 10; i++) {
            System.out.println(Thread.currentThread().getName()+" => "+i);
        }
    }
}

class ThreadTwo implements Runnable {
    public void run(){
        for (int i = 0; i < 10; i++) {
            System.out.println(Thread.currentThread().getName()+" => "+i);
        }
    }
}

public class ThreadApp {
    public static void main(String[] args) {
        ThreadOne threadOne = new ThreadOne();
        threadOne.start();

        Thread threadTwo = new Thread(new ThreadTwo());
        threadTwo.start();
    }
}