Name and expiration date of url using java

Program to show the name date and expiration date of entered url using java 

import java.util.Scanner;

import java.util.*;

import java.net.*;

public class programno3

{

      URL z;

      URLConnection y;

      String w;

           

      programno3()

      {

            try

            {

            System.out.println("Enter The URL:-");

            Scanner rv=new Scanner(System.in);

            w=rv.nextLine();

            z=new URL(w);

            y=z.openConnection();

            long a=y.getDate();

            long b=y.getExpiration();

            long c=y.getLastModified();

            System.out.println("Date"+a);

            System.out.println("Expiration"+b);

            System.out.println("modified"+c);

            }

            catch(Exception e)

            {

                  System.out.println("error");

                  System.exit(0);

            }

      }

      public static void main(String...s)

      {

            new programno3();

      }

}