Ads popup handling code

Set<String> windowId = cDriver.getWindowHandles();    // get  window id of current window
            Iterator<String> itererator = windowId.iterator(); 

            String mainWinID = itererator.next();
            String  newAdwinID = itererator.next();

            cDriver.switchTo().window(newAdwinID);
            System.out.println(cDriver.getTitle());
            Thread.sleep(3000);
            cDriver.close();

            cDriver.switchTo().window(mainWinID);
            System.out.println(cDriver.getTitle());
            Thread.sleep(2000);