Program to implement Thread by extending Thread class in java

import java.io.*;

class NewThread extends Thread
{ NewThread()
  { 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(Exception e){}
      System.out.println("Exiting child thread");
    }
 }

    class thread2
    { public static void main(String args[])
      { NewThread obj=new NewThread();
         try
         { for(int i=5;i>0;i--)
            { System.out.println(" Main thread: " +i);
               Thread.sleep(1000);
             }
          }catch(Exception e){}
          System.out.println("Exiting Main Thread");
       }
      }