Hovering Mouse in Selenium

We can hover the mouse to a webElement using Actions Class of org.openqa.selenium.iteractions packages.

For example:

This is our test case. 

Hovering mouse over an element of a menu, it displays sub menu

We can use this class by Keyboard or mouse.
Methods:
Action   buid():Generates a composite action containing all actions, ready to be performed.
Actions  click():Clicks at the current mouse location.
Actions Click(WebElement onelement):Clicks on the middle of the given element.
these are similar for doubleClick() and doubleClick(WebElement onelement).
Actions dragAndDrop(WebElement source, WebElement target): A convenience method that performs click and hold at the location of the source element, moves to the location of the target element  , then releases the mouse.
Actions moveToElement(WebElement to element):Moves the mouse to the middle of the element.
perform():A convenience method for performing the actions without calling build() first.

Methods hover and click element