寻找链表中倒数第k个节点

 public ListNode getKthFromEnd(ListNode head, int k) {
        ListNode slow=head;
        ListNode fast=head;
        int t = 0;
        for(;fast!=null;){
            if(t>=k) {
               slow=slow.next; 
            }
            fast = fast.next;
            t++;
        }
        return slow;
    }