Cannot invoke method add() on null object while adding to Java List

Asked Jul 15 '21 at 07:53

Active Jul 15 '21 at 07:53

Viewed 27 times

I am getting a nullpointer exception while trying to add a string to list inside for loop:

List<WebElement> ordercharges = browser.driver.findElements(By.xpath("//*[@class='order-charges-amount ng-binding']"))
            println("Order charges found are"+ordercharges.size())
            for(int i=0;i<ordercharges.size();i++)
            {
                String charges =  ordercharges.get(i).getText()
                liteshippingcharges.add(charges)
            }

Here is the error details: Cannot invoke method add() on null object java.lang.NullPointerException: Cannot invoke method add() on null object

asked Jul 15 '21 at 07:53

Karthik Lakshmanrao

1

That means your `List` is `null`, it is not the one you have initialized in your example code. `liteshippingcharges` is `null`, now you have to find out why. – deHaar Jul 15 '21 at 07:56
3

Basically this means that `liteshippingcharges` is null. – Jon Skeet Jul 15 '21 at 07:56
1

As a side note, I'd strongly recommend that you start following Java naming conventions, leading to names such as `orderCharges` and `liteShippingCharges`. – Jon Skeet Jul 15 '21 at 07:56
Thanks @deHaar you are correct i forgot to initialize list. – Karthik Lakshmanrao Jul 18 '21 at 17:03

Cannot invoke method add() on null object while adding to Java List

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