Leetcode.203---------移除链表元素（虚拟节点法）java实现

虚拟结点法刷链表类的题，经常会用到，尤其是对与链表头节点的处理，一定要记住! ! !

class Solution {
    public ListNode removeElements(ListNode head, int val) {
        ListNode pHead = new ListNode(-1);
        pHead.next = head;
        ListNode cur = pHead;
        while(cur!=null&&cur.next!=null){
            if(cur.next.val == val){
                cur.next=cur.next.next;
            }else{
                cur= cur.next;
            }
        }
        return pHead.next;
    }
}