package CountDownListNode;public class CountDown public class ListNode int val; ListNode next; ListNode int x val = x; public ListNode getKthFromEndL

package CountDownListNode;

public class CountDownTest { public static void main(String[] args) { CountDown countDown = new CountDown();

    // 创建链表
    CountDown.ListNode node1 = countDown.new ListNode(1);
    CountDown.ListNode node2 = countDown.new ListNode(2);
    CountDown.ListNode node3 = countDown.new ListNode(3);
    CountDown.ListNode node4 = countDown.new ListNode(4);
    CountDown.ListNode node5 = countDown.new ListNode(5);

    // 构建链表
    node1.next = node2;
    node2.next = node3;
    node3.next = node4;
    node4.next = node5;

    // 测试获取倒数第k个节点
    CountDown.ListNode result = countDown.getKthFromEnd(node1, 2);
    System.out.println(result.val);  // 输出4
}