Threads in Java pgm

Creating Threads in Java

public class PingPONG extends Thread

{

      private String word;

      private int delay;  

      public PingPONG(String whatToSay, int delayTime)

{

        word = whatToSay; 

        delay = delayTime; 

    }

    public void run()

{

        try

{

            for (;;)

{

                System.out.print(word + " "); 

                sleep(delay);

            }

        }

catch (InterruptedException e)

{

            return;

        }

    }

 public static void main(String[] args)

{

           new PingPONG("Ping", 33).start();

           new PingPONG("PONG",100).start();

    }

}