remove from linked list

public class Solution {
    /**
     * @param head a ListNode
     * @param val an integer
     * @return a ListNode
     */
    public ListNode removeElements(ListNode head, int val) {
        ListNode tmp = new ListNode(0);

        while (head!=null){
            if (head.val == val) {
                head = head.next;
            }
            else break;
        }
        tmp.next = head;
        while (tmp!=null && tmp.next != null ) {
                if (tmp.next.val == val) {
                    tmp.next = tmp.next.next;
                    tmp=tmp.next;
                    continue;
                }
            tmp=tmp.next;
        }
        if (tmp != null) {

            if (tmp.val == val) {
                tmp = tmp.next;
            }
        }
        return head;

    }
}