Mirror image of binary tree without Recursion

Latest Source Code:
Github: BinaryTreeMirrorWithoutRecursion.java

Output:

 Binary Tree: 
       A               
      / \       
     /   \      
    /     \     
   /       \    
   B       C       
  / \     / \   
 /   \   /   \  
 D   E   F   G   
      \         
      H         
                                
Mirror Tree: 
       A               
      / \       
     /   \      
    /     \     
   /       \    
   C       B       
  / \     / \   
 /   \   /   \  
 G   F   E   D   
        /       
        H