[Java]send Get Message to a website

import java.io.*;
import java.net.*;
import java.util.Scanner;

public class RandomWeb {
   
   public static void main(String args[]){
    
    Scanner scan = new Scanner(System.in);
    System.out.println("Your Website:");
    String siteUrl = scan.next();
    System.out.println("Your Range of Number:");
    String range[] = scan.next().split(",");
    System.out.println("Setting Wait:");
    int slpTime = scan.nextInt();
    
    int rangeStart = Integer.parseInt(range[0]);
    int rangeEnd = Integer.parseInt(range[1]);
    
    if(rangeStart > rangeEnd){
      System.out.println("Range Error!");
      return;
    }
    for(int i = rangeStart ; i < rangeEnd ; i++){
      
      Thread th = new Thread(new GetHtml(siteUrl.replaceAll("###",String.valueOf(rangeStart)),slpTime));  
        th.start(); 
    }
    
   }

  public static class GetHtml implements Runnable{

   String urlToRead;
   int slpTime;
   GetHtml(String urlToRead,int slpTime){
    this.urlToRead = urlToRead;
    this.slpTime = slpTime;
   }
   
   
   public void run() {  
      URL url; // The URL to read
      HttpURLConnection conn; // The actual connection to the web page
      BufferedReader rd; // Used to read results from the web page
      String line; // An individual line of the web page HTML
      String result = ""; // A long string containing all the HTML
      try {
         url = new URL(urlToRead);
         conn = (HttpURLConnection) url.openConnection();
         conn.setRequestMethod("GET");
         rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
         while ((line = rd.readLine()) != null) {
            result += line;
         }
         rd.close();
      } catch (Exception e) {
          //System.out.println("Web site not found!!");
         e.printStackTrace();
      }

      try{
      Thread.sleep(slpTime*1000);
      }catch(Exception e){
        System.out.println("wait time error!!");
      }  
   }
   
}

}