【剑指offer】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         TreeNode tempNode = null;
17         if(root!=null){
18             tempNode = root.left;
19             root.left = root.right;
20             root.right = tempNode;
21             Mirror(root.left);
22             Mirror(root.right);
23             }
24          }
25        
26     }