why we assign firefoxdriver instance to webdriver

Question

I am novice to Java or Selenium.

I just need help to understand one basic question.

Why we assign firefoxdriver instance to WebDriver? WebDriver driver=new Firef

Answer 1

It will make use of Interface Concept.See the below code.

 FirefoxDriver  f = new FirefoxDriver();
 ChromeDriver c = new ChromeDriver();

To load a page using chrome,

c.get("google.com");

If I want to use same call with firefox, I need to comment the above line and need to write a new line like this

//c.get("google.com");
f.get("google.com");

This will go on increasing , ending up with specific code for each instance of driver. But if I assign the the driver instance to WebDriver interface variable, I can write single set of code which will work for all drivers.

 WebDriver d;
    d  = FireFoxDriver();
    //just replace the above line with d = ChromeDriver() or InternetExplorer();
    d.get("google.com");
    d.getTitle();
    d.close();