（LinkedList） Remove Linked List Elements

Remove all elements from a linked list of integers that have value val.

Example
Given: 1 --> 2 --> 6 --> 3 --> 4 --> 5 --> 6, val = 6
Return: 1 --> 2 --> 3 --> 4 --> 5

/**
* Definition for singly-linked list.
* public class ListNode {
*     int val;
*     ListNode next;
*     ListNode(int x) { val = x; }
* }
*/
public class Solution {
public ListNode removeElements(ListNode head, int val) {
while(head!=null && head.val==val)
head=head.next;
if(head==null)
return head;
ListNode cur=head;
while(cur!=null && cur.next!=null){
if(cur.next.val==val){
cur.next=cur.next.next;
}
else
cur=cur.next;
}
return head;
}
}