How to work with Cookies in a web site using selenium webdriver

import java.util.Set;
import org.openqa.selenium.Cookie;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;


public class FindAllCookiesInaWebSite
{
    public static void main(String[] args)
    {
        WebDriver driver=new FirefoxDriver();
        driver.get("http://in.yahoo.com/");
       
        Set<Cookie> cookies=driver.manage().getCookies();
       
        //To find the number of cookies used by this site
        System.out.println("Number of cookies in this site "+cookies.size());
       
        for(Cookie cookie:cookies)
        {
            System.out.println(cookie.getName()+" "+cookie.getValue());
           
            //This will delete cookie By Name
            //driver.manage().deleteCookieNamed(cookie.getName());
           
            //This will delete the cookie
            //driver.manage().deleteCookie(cookie);
        }
       
        //This will delete all cookies.
        //driver.manage().deleteAllCookies();
       
    }

}