How to switch tabs using Selenium Webdriver

Generally it comes the scenario  when on clicking an element in Web Application results in opening a a new tab. 

We can focus on the newly opened tab using the following snippet


String oldTab = driver.getWindowHandle();
   ArrayList<String> newTab = new ArrayList<String>(driver.getWindowHandles());
   newTab.remove(oldTab);

   // change focus to new tab
   driver.switchTo().window(newTab.get(0));
assertEquals("java - Google Search", driver.getTitle());// expected,actual