解题思路:递归算法
/** public class TreeNode { int val = 0; TreeNode left = null; TreeNode right = null; public TreeNode(int val) { this.val = val; } } */import java.lang.Math;public class Solution { public int TreeDepth(TreeNode pRoot) { if(pRoot == null){ return 0; } int left = TreeDepth(pRoot.left); int right = TreeDepth(pRoot.right); return Math.max(left, right) + 1; } }