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import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;

public class Main {
   public static void main(String args[]) 
   throws Exception {
      URL url = new URL("http://www.tutorialpro.org");
      HttpURLConnection httpCon = 
      (HttpURLConnection) url.openConnection();
      long date = httpCon.getDate();
      if (date == 0)
      System.out.println("Unable to get the information.");
      else
      System.out.println("Date: " + new Date(date));
   }
}

Date: Mon May 04 11:57:06 CST 2015