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javanullpointerexceptionlinked-list
Ayesha Malik
Ayesha Malik

Reputation: 11

Linked List NullPointerException Java

In LinkedList we normally assign null value to last node and also use this condition to check for the last node.

I am checking for the last node with the same condition either its "next" node link is null or not. But I'm unable to handle NullPointerException when I get null value by the method "getNext".

while(lastNode.getNext() != null)
{
lastNode= lastNode.getNext();
}

Upvotes: 1

Views: 2825

Answers (1)

Shkodran Gerguri
Shkodran Gerguri

Reputation: 69

I assume this is a custom implementation of a LinkedList; java.util.LinkedList does not have a getNext() method.

That said, what you want is:

while (current != null) {
    past = current;
    current = current.getNext();
}

return past;

I am assuming here that you want to return the last node, and that past is a variable of the same type as current.

Upvotes: 1

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