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链表相关 |
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[06: 从头到尾打印链表](https://leetcode-cn.com/problems/cong-wei-dao-tou-da-yin-lian-biao-lcof/) |
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```java |
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class Solution { |
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public int[] reversePrint(ListNode head) { |
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ListNode temp = head; |
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int size = 0; |
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while (temp != null) { |
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temp = temp.next; |
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size++; |
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} |
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int[] result = new int[size]; |
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int index = size - 1; |
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while (head != null) { |
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result[index--] = head.val; |
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head = head.next; |
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} |
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return result; |
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} |
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} |
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``` |
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```java |
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class Solution { |
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public int[] reversePrint(ListNode head) { |
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Stack<ListNode> stack = new Stack<ListNode>(); |
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ListNode temp = head; |
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while (temp != null) { |
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stack.push(temp); |
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temp = temp.next; |
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} |
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int size = stack.size(); |
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int[] print = new int[size]; |
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for (int i = 0; i < size; i++) { |
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print[i] = stack.pop().val; |
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} |
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return print; |
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} |
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} |
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``` |
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[22:链表中倒数第 k 个节点](https://leetcode-cn.com/problems/lian-biao-zhong-dao-shu-di-kge-jie-dian-lcof/) |
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```java |
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class Solution { |
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public ListNode getKthFromEnd(ListNode head, int k) { |
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int length = 0; |
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ListNode temp = head; |
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while (temp != null) { |
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temp = temp.next; |
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length++; |
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} |
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for (int i = 0; i < length - k; i++) { |
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head = head.next; |
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} |
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return head; |
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} |
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} |
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``` |
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```java |
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class Solution { |
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public ListNode getKthFromEnd(ListNode head, int k) { |
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ListNode h0 = head; |
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for (int i = 0; i < k; i++) { |
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h0 = h0.next; |
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} |
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while (h0 != null) { |
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h0 = h0.next; |
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head = head.next; |
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} |
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return head; |
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} |
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} |
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``` |
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