Get cookies from selenium session

I want to get session variable and cookies after login. i have used selenium webdriver and successfully login. but how to get session and cookies after login in selenium.here is my code:

try {
            WebDriver driver = new FirefoxDriver();
            driver.get("https://pacer.login.uscourts.gov/csologin/login.jsf");
            System.out.println("the title is"+driver.getTitle());
            WebElement id= driver.findElement(By.xpath("/html/body/div[3]/div/div[1]/div[1]/div[15]/div[2]/form/table[1]/tbody/tr/td[2]/input"));
            WebElement pass=driver.findElement(By.xpath("/html/body/div[3]/div/div[1]/div[1]/div[15]/div[2]/form/table[2]/tbody/tr/td[2]/input"));
            WebElement button=driver.findElement(By.xpath("/html/body/div[3]/div/div[1]/div[1]/div[15]/div[2]/form/div[2]/button[1]"));

            id.sendKeys("USERNAME");
            pass.sendKeys("PASSWORD");
            button.click();
        } catch (Exception e) {

            e.printStackTrace();
        }

please provide your suggestion asap.

Thanks