gitee-community-gitee-7th-event-3
/
看看你有多深.java

/**
 * 二叉树的深度
 * @author jdl
 */
public class MaxDepth {
    public int maxDepth(TreeNode root) {
        if (root == null) {
            return 0;
        }
        return 1 + Math.max(maxDepth(root.left), maxDepth(root.right));
    }
}