[LeetCode刷题] Binary Tree Inorder Traversal

来源：互联网发布：汽车行业erp软件编辑：程序博客网时间：2024/06/04 05:50

今天自己写了一下inorder traversal，写了一个挺neat的solution，感觉不错

/** * Definition for binary tree * public class TreeNode { *     int val; *     TreeNode left; *     TreeNode right; *     TreeNode(int x) { val = x; } * } */public class Solution {    public List<Integer> inorderTraversal(TreeNode root) {        ArrayList<Integer> l = new ArrayList<Integer>();        if(root == null) {            return l;        }        l.addAll(inorderTraversal(root.left));        l.add(root.val);        l.addAll(inorderTraversal(root.right));        return l;    }}

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