Re: Ping from JAVA to IP Address

I'm tiring to ping to External IP address (e.x : www.google.com) but I
keep get false every time.
I write function to do the ping. I can ping to local IP address fine,
but when I try to ping any external IP (e.x. www.google.com) it wont
work I keep get false.
this is my code
============ start ===============
package netscan;

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;

public class NetPing
{
     boolean reach = false;
     public boolean pinging()
     {
         try
         {
             InetAddress address =
InetAddress.getByName("www.google.com");
             reach =address.isReachable(60000);
             System.out.println(String.valueOf(reach));

         }
         catch(UnknownHostException uhe)
         {
             System.out.println(uhe.toString());
         }
         catch(IOException io)
         {
             System.out.println(io.toString());
         }
         catch(Exception e)
         {
             System.out.println(e.toString());
         }

         return reach;
     }

}
============ end ===============