WebDriver

WebDriver Interface

WebDriver is an interface in selenium library which the object representation of Web Browser. Implementation of which is provided by different Browser types line Chrome, FireFox etc.,

WebDriver driver = new ChromeDriver;
//or
WebDriver driver = new FireFoxDriver();

Now we can perform all the actions on the browser using this object.

Some of which are are.

Modifier and Type	Method and Description
void	close()
	Close the current window, quitting the browser if it's the last window currently open.
WebElement	findElement(By by)
	Find the first WebElement using the given method.
java.util.List<WebElement>	findElements(By by)
	Find all elements within the current page using the given mechanism.
void	get(java.lang.String url)
	Load a new web page in the current browser window.
java.lang.String	getCurrentUrl()
	Get a string representing the current URL that the browser is looking at.
java.lang.String	getPageSource()
	Get the source of the last loaded page.
java.lang.String	getTitle()
	The title of the current page.
java.lang.String	getWindowHandle()
	Return an opaque handle to this window that uniquely identifies it within this driver instance.
java.util.Set<java.lang.String>	getWindowHandles()
	Return a set of window handles which can be used to iterate over all open windows of this WebDriver instance by passing them to switchTo().WebDriver.Options.window()
WebDriver.Options	manage()
	Gets the Option interface
WebDriver.Navigation	navigate()
	An abstraction allowing the driver to access the browser's history and to navigate to a given URL.
void	quit()
	Quits this driver, closing every associated window.
WebDriver.TargetLocator	switchTo()
	Send future commands to a different frame or window.

These details are taken from Selenium Official Java Docs.