目 录
- ListNode类
- TreeNode类
参考:Java中的ListNode和TreeNode类 这是2个需要自定义的类,链表和二叉树。
ListNode类
public class ListNode {
int val;
ListNode next;
ListNode() {}
ListNode(int val) { this.val = val; }
ListNode(int val, ListNode next) { this.val = val; this.next = next; }
}
链表的创建及遍历如下:
public class Solution {
public static void main(String[] args) {
ListNode head1 = new ListNode(0);//创建表头node
ListNode nextNode;//创建遍历指针
nextNode = head1;//指针指向表头
for (int i = 1; i < 3; i++) {
ListNode node = new ListNode(i);//创建新node
nextNode.next = node;//将上一个node的next指向新node
nextNode = node;//将指针指向新node
}
//遍历
nextNode = head1;//指针指向表头
while (nextNode != null) {//如果node存在
System.out.println(nextNode.val);//打印val值
nextNode = nextNode.next;//指针指向下一个node
}
}
}
TreeNode类
public class TreeNode {
int val;
TreeNode left;
TreeNode right;
TreeNode(int x) {
val = x;
}
}