Selenium Webdriver, How to fix this NullPointer exception?

Question

I am trying to make a List of elements that I can sort through later, but whenever I create the list I get a nullPointer exception.

List<WebElement> tempList = null;
tempList.addAll(driver.findElements(By.className("result-item")));

The HTML page definately has multiple elements with the provided class name, so I'm totally confused. I also get the same exception if I change the code to

tempList.add(driver.findElement(By.className("result-item")));

Answer 1

You set tempList to null and then try to invoke a method on the (not existing) referenced object (because the reference points to null ).

Try the following:

List<WebElement> tempList = new List<>();
tempList.addAll(driver.findElements(By.className("result-item")));