Linked list in java

The program is

List* recur_rlist(List* head)
{
List* result;
if(!(head && head->next))
return head;
result = recur_rlist(head->next);
head->next->next = head;
head->next = NULL;
return result;
}
void printList(List* head)
{
while(head != NULL) {
std::cout<data<<" ";
head = head->next;
}
}
void main()
{
List* list = createNode(2);
append(list, createNode(3));
append(list, createNode(4));
append(list, createNode(5));
append(list, createNode(6));
List* revlist = recur_rlist(list);
printList(revlist);
}