This task   (the reverse of   URL encoding   and distinct from   URL parser)   is to provide a function
or mechanism to convert an URL-encoded string into its original unencoded form.



Test cases

   The encoded string   "http%3A%2F%2Ffoo%20bar%2F"   should be reverted to the unencoded form   "http://foo bar/".
   The encoded string   "google.com/search?q=%60Abdu%27l-Bah%C3%A1"   should revert to the unencoded form   "google.com/search?q=`Abdu'l-Bahá".


import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
 
public class Main
{
    public static void main(String[] args) throws UnsupportedEncodingException
    {
        String encoded = "http%3A%2F%2Ffoo%20bar%2F";
        String normal = URLDecoder.decode(encoded, "utf-8");
        System.out.println(normal);
    }
}