import java.util.NoSuchElementException;

class Node {

int value;

Node next;

public Node(int value, Node next) {

this.value = value;

this.next = next;

}

}

public class LinkedList {

Node root;

public LinkedList() {

this.root = null;

}

public void append(int value) {

if(this.root == null) {

this.root = new Node(value, null);

return;

}

Node n = this.root;

if(n.next == null) {

n.next = new Node(value, null);

return;

}

while(n.next != null) {

n = n.next;

n.next = new Node(value, null);

}

}

this is a java file, and append() has a problem.

Method arguments: value = 99 Local variables: n = instance of Node(id=998) main[1]

bolded line is the only place where it has an error. how can I fix this line? Why this cause the error?