(十八)
题目描述:操作给定的二叉树,将其变换为源二叉树的镜像。
1 /** 2 public class TreeNode { 3 int val = 0; 4 TreeNode left = null; 5 TreeNode right = null; 6 7 public TreeNode(int val) { 8 this.val = val; 9 10 } 11 12 } 13 */ 14 public class Solution { 15 public void Mirror(TreeNode root) { 16 if(root == null){ 17 return; 18 } 19 if(root.left == null && root.right == null){ 20 return; 21 } 22 TreeNode temp = root.left; 23 root.left = root.right; 24 root.right = temp; 25 26 if(root.left!=null){ 27 Mirror(root.left); 28 } 29 30 if(root.right!=null){ 31 Mirror(root.right); 32 } 33 34 } 35 }