Updation of webpage to the last modified date

Hi,
I needed to find the last modified date of webpage. for that i used one code but that giving default date as output.solve my pbm.

here the code,

Code Java:

// Demonstrate URLConnection. 
import java.net.*; 
import java.io.*; 
import java.util.Date; 
 
class UCDemo 
{ 
public static void main(String args[]) throws Exception { 
int c; 
URL hp = new URL("http", "www.google.com", 80, "/"); 
System.out.print(hp);
URLConnection hpCon = hp.openConnection(); 
System.out.println("Date: " + new Date(hpCon.getDate())); 
System.out.println("Content-Type: " + 
hpCon.getContentType()); 
System.out.println("Expires: " + hpCon.getExpiration()); 
System.out.println("Last-Modified: " + 
new Date(hpCon.getLastModified())); 
int len = hpCon.getContentLength(); 
System.out.println("Content-Length: " + len); 
if (len > 0) { 
System.out.println("=== Content ==="); 
InputStream input = hpCon.getInputStream(); 
int i = len; 
while (((c = input.read()) != -1) && (-i > 0)) { 
System.out.print((char) c); 
} 
input.close(); 
} else { 
System.out.println("No Content Available"); 
} 
} 
}

output:

Quote:

Content-Type: null
Expires: 0
Last-Modified: Thu Jan 01 05:30:00 GMT+05:30 1970
Content-Length: -1
No Content Available