Reversing a Linked List in Java

Question

Hello all,

I'm trying to reverse a linked list in Java and am having some difficulty. I'm following the instructions in this post, but I'm getting an error when I run my code.

I'm including my code below. Any help would be greatly appreciated.

Thanks in advance!
public static ListNode reverseList(ListNode head) 

{ 
    ListNode prev = null; 
    ListNode curr = head; 
    ListNode next = null; 
    while (curr != null) { 
        next = curr.next; 
        curr.next = prev; 
        prev = curr; 
        curr = next; 
    } 
    head = prev; 
    return head; 
}