Thread Creation in Java by Implement Runnable interface

Hi

To create Multiple thread by implement runnable interface in java
Code:

public class Threadtest implements Runnable{

   

    public static void main(String [] args)

    {

        Threadtest t= new Threadtest();

        Thread t1= new Thread(t);

        Thread t2=new Thread(t);

        Thread t3= new Thread(t);

        t1.setName("kumud1");

        t2.setName("kumud2");

        //t3.setName("kumud3");

        t1.start();

        t2.start();

        //t3.start();

       

    }

    public void run() {

        for (int a=0; a<4;a++)

       

        System.out.println("The Current Thread is"+Thread.currentThread().getName());

        try{

        Thread.sleep(5*60*1000000000);

        }

        catch(Exception ex)

        {

           

        }

    }

   

   

}