How to switch between frames in Selenium WebDriver using Java

WebDriver’s driver.switchTo().frame() method takes one of the three possible arguments:

• A number.

  Select a frame by its (zero-based) index. That is, if a page has three
  frames, the first frame would be at index 0, the second at index 1
  and the third at index 2. Once the frame has been selected, all
  subsequent calls on the WebDriver interface are made to that frame.

• A name or ID.

  Select a frame by its name or ID. Frames located by matching name
  attributes are always given precedence over those matched by ID.

• A previously found WebElement.

  Select a frame using its previously located WebElement.

Get the frame by it’s id/name or locate it by driver.findElement() and you’ll be good.