urgent-please help "How to validate telnet connectivity in my java code"

import java.io.*;
import java.net.*;
import java.util.*;
import java.util.TimerTask;
import org.apache.commons.net.telnet.TelnetClient;
class Connectivity extends TimerTask
{
    public static void main(String args[])
    {
        try
        {
            System.out.println("Please enter ip address");
            Scanner sc=new Scanner(System.in);
            String ip=sc.nextLine().trim();
            System.out.println("Please enter port number");
            TimerTask con  = new Connectivity();
            Scanner sc1=new Scanner(System.in);
            int port=sc1.nextInt();
            Timer timer = new Timer();
            timer.scheduleAtFixedRate(con,1,1000);
            Socket s1=new Socket(ip,port);
            InputStream is=s1.getInputStream();
            DataInputStream dis=new DataInputStream(is);
            if(dis!=null)
            {
                System.out.println("Connected with ip "+ip+" and port "+port);
            }
            else
            {
                System.out.println("Connection invalid");
            }

            dis.close();
            s1.close();

        }
        catch(Exception e)
        {
            System.out.println("Not Connected,Please enter proper input");

        }

    }

    @Override
    public void run() {
        // TODO Auto-generated method stub

    }
}