[Leetcode] Merge Two Sorted Lists

Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.

Solution:

/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode(int x) {
 *         val = x;
 *         next = null;
 *     }
 * }
 */
public class Solution {
    public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
        ListNode dummy=new ListNode(0);
        ListNode cur=dummy;
        while(l1!=null&&l2!=null){
            if(l1.val<l2.val){
                cur.next=l1;
                l1=l1.next;
                cur=cur.next;
            }else{
                cur.next=l2;
                l2=l2.next;
                cur=cur.next;
            }
        }
        if(l1!=null){
            cur.next=l1;
        }else if(l2!=null){
            cur.next=l2;
        }
        return dummy.next;
    }
}