int [] res = null;
List<Integer> list = new ArrayList<Integer>();
ListNode p = head;
ListNode cur = head;
while(p != null)
{
list.add(p.val);
p = p.next;
}
res = list.stream().mapToInt(Integer::valueOf).toArray();
int [] res = null;
List<Integer> list = new ArrayList<Integer>();
ListNode p = head;
ListNode cur = head;
while(p != null)
{
list.add(p.val);
p = p.next;
}
res = list.stream().mapToInt(Integer::valueOf).toArray();