两个链表的第一个公共节点

 

 

public class Solution {
    public ListNode getIntersectionNode(ListNode headA, ListNode headB) {
         ListNode p1 = headA, p2 = headB;
         while(p1 != p2){
             p1 = p1 == null ? headB : p1.next;
             p2 = p2 == null ? headA : p2.next;
         }
         return p1;
    }
}