How to use Actions class in Selenium Webdriver

Question

Why do we need Actions class and what is the use of it if it is not used ever in the code.
Below is the code I took from other site.

public class SwitchFrames {

   public static void main(String... args) {
      WebDriver driver = new FirefoxDriver();
      driver.get("file://C:/Frames.html");

      Actions action = new Actions(driver);

      driver.switchTo().frame(0);
      WebElement txt = driver.findElement(By.name("1"));
      txt.sendKeys("Frames Works");

      driver.switchTo().defaultContent();

      driver.switchTo().frame(1);
      txt = driver.findElement(By.name("2"));
      txt.sendKeys("Frames always works");
   }

}

Answer 1

In seleniun webdriver it is not mandatory or it is not required to use actions
always or it is not like that it is not used ever but the use of actions class as switching to frame or using
alert is different and using Actions is different concept.

You can try using different functions of Actions class http://selenium.googlecode.com/git/docs/api/java/org/openqa/selenium/interactions/Actions.html
and for switch is used to shift the control of webdirver from one page to another or one frame to another