To Implement Web Crawler in Java BE(IT) CLP-II Pratical

 import java.net.*;  
 import java.io.*;  
 import java.util.regex.*;  
 public class crawler {  
      public static void main(String[] args) {  
           String source_url="https://google.com";  
           try  
           {  
                URL url = new URL(source_url);  
                URLConnection yc = url.openConnection();  
                String data=null;  
                BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));  
                String inputLine;  
                while ((inputLine = in.readLine()) != null)  
                     data=data+inputLine ;  
                in.close();  
                Integer i=0;  
                Pattern pattern = Pattern.compile("]*href=\"[^>]*>(.*?)");  
                Matcher matcher = pattern.matcher(data);  
                while (matcher.find())   
                {  
                     System.out.println((i+1)+ matcher.group());  
                     i=i+1;  
                }  
                System.out.println("TOTAL LINKS:"+i);  
           }  
           catch(Exception e)  
           {  
                System.out.println(e);  
           }  
      }  
 }