Mirror a BST

public class MirroraBST{
    static class Node{
        int data;
        Node left;
        Node right;

        public Node (int data){
            this.data = data;
            this.left = this.right = null;
        }

    }
    public static Node createMirror(Node root){
        if(root==null){
            return null;
        }
        Node leftMirror = createMirror(root.left);
        Node rightMirror = createMirror(root.right);

        root.left = rightMirror;
        root.right = leftMirror;
        return root;
    }
    public static void preorder(Node root){
        if(root==null){
            return;
        }
        System.out.print(root.data + " ");
        preorder(root.left);
        preorder(root.right);
    }
    public static void main(String args[]){
        /*
                 8
                / \
               5   10
              / \   \
             3   6   11
        
        to
          
                 8
                / \
               10  5
              /   /  \
             11   6   3
             mirror bst


         */

        Node root = new Node(8);
        root.left = new Node(5);
        root.right = new Node(10);
        root.left.left = new Node(3);
        root.left.right = new Node(6);
        root.right.right = new Node(11); 

         root = createMirror(root);
         preorder(root);


    }
}