Click the last but one checkbox

Question

In a page there are n number of checkboxes. Each time the page refreshes the list of checkboxes will also be refreshed and can be a different size. How do I click the second last (last but one) checkbox every time?

Answer 1

Locate all checkboxes i.e.:

List<WebElements> checkboxes = driver.findElements(By...)

Now, for a 0-based list, the last element will be checkboxes.size()-1, so what we want to do is:

if (checkboxes.size() > 0) {
        if (checkboxes.size() > 1) {
            checkboxes.get(checkboxes.size() - 2).click();
        } else {
            //either select the last and only checkbox or throw an error
        }
    } else {
        //handle the error as list was empty
    }

As this will select the second last element.