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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. class Node {
  8. 	public Node left;
  9. 	public int data;
  10. 	public Node right;
  11.  
  12. 	public Node(int val) 	{
  13. 		this.data=val;
  14. 	}
  15. }
  16.  
  17.  
  18. /* Name of the class has to be "Main" only if the class is public. */
  19.  class MirrorTree {
  20.  
  21. 	public void mirror(Node root) {
  22. 		if(root== null)
  23. 			return ;
  24. 		else
  25. 		{
  26. 			mirror(root.left);
  27. 			mirror(root.right);
  28.  
  29. 			swap(root);
  30. 		}
  31. 	}
  32.  
  33. 	// Swap Sub Trees of a Node
  34. 	private void swap(Node node) {
  35. 		Node temp=node.right;
  36. 		node.right=node.left;
  37. 		node.left=temp;
  38.  
  39. 	}
  40.  
  41. 	// inorder display subroutine
  42. 	public void inorder(Node r) {
  43. 		if (r != null) {
  44. 			inorder(r.left);
  45. 			System.out.print(r.data + "\t");
  46. 			inorder(r.right);
  47. 		}
  48. 	}
  49.  
  50. 	public static void main(String[] args) {
  51. 		Node root=new Node(12);
  52.  
  53. 		Node n1=new Node(14);
  54. 		Node n2=new Node(18);
  55. 		Node n3=new Node(10);
  56. 		root.left=new Node(8);
  57. 		root.right=new Node(16);
  58. 		root.left.left=new Node(6);
  59. 		root.left.right=n3;
  60. 		root.right.left=n1;
  61. 		root.right.right=n2;
  62.  
  63.  
  64. 		MirrorTree m=new MirrorTree();
  65. 		System.out.println("Before:");
  66. 		m.inorder(root);
  67. 		m.mirror(root);
  68.  
  69. 		System.out.println("\n After:");
  70. 		m.inorder(root);
  71.  
  72. 	}
  73.  }
Success #stdin #stdout 0.08s 380160KB
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stdin
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Standard input is empty
stdout
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Before:
6	8	10	12	14	16	18	
 After:
18	16	14	12	10	8	6
https://ideone.com/TUvM9O
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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