public class ThreadDemo2
{
   public static void main(String [] args)
   {
       TestThread tt=new TestThread();
       Thread t=new Thread(tt);
       t.start();
       while(true)
       {
          System.out.println("main thread is running");
       }
   }
}
class TestThread implements Runnable
{
    public void run()
    {
       while(true)
       {
           System.out.println(Thread.currentThread().getName()+" is running");
       }
    }
}