题解 | #两个链表的第一个公共结点#

import java.util.*;

public class Solution {
    public ListNode FindFirstCommonNode(ListNode pHead1, ListNode pHead2) {
        ListNode p2 = pHead2;
        if (pHead1 == null || pHead2 == null)
            return null;
        while(pHead1 != null){
            while(pHead2 != null){
                if(pHead1 == pHead2)
                    return pHead1;
                pHead2 = pHead2.next;
            }
            pHead1 = pHead1.next;
            pHead2 = p2;
        }
        return null;
    }
}