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Tree Traversals Program in java ( Preorder | PostOrder | InrderOrder )


TREE PROGRAM

                      Tree Traverseral ( PreOrder | PostOrder| InOrder )

class Node{
int key;
Node left,right;
public Node(int value){
key = value;
left = right = null;
     }
     }

public class BinaryTree {
Node root;
BinaryTree(int value){
root = new Node(value);
}
BinaryTree() {
root = null;
}

public void printInorder(Node node){
if(node == null)
{
return ;
}
printInorder(node.left);
System.out.print(node.key+ " ");
printInorder(node.right);
}
  
   void printInorder() {
   System.out.println("Inorder Traversal");
   printInorder(root);

}
   void printPreOrder(Node node){
   if(node == null)
   return;
   System.out.print(node.key+" ");
   printPreOrder(node.left);
   printPreOrder(node.right);
  
   }
   void printPreOrder(){
   System.out.println("Pre-order Traversal");
   printPreOrder(root);
   }
   void printPostOrder(Node node){
   if(node == null)
   return;
 
   printPreOrder(node.left);
   printPreOrder(node.right);
   System.out.print(node.key+" ");
  
   }
   void printPostOrder(){
   System.out.println("Pre-order Traversal");
   printPostOrder(root);
   }
  
public static void main(String []args){
BinaryTree tree = new BinaryTree();
tree.root = new Node(1);
tree.root.left = new Node(2);
tree.root.right = new Node(3);
tree.root.left.left = new Node(4);

tree.root.left.right = new Node(5);
tree.root.right.left= new Node(6);
tree.root.right.right = new Node(7);

tree.printInorder();
tree.printPreOrder();
tree.printPostOrder();



}
}


 OUTPUT :
Inorder Traversal
4 2 5 1 6 3 7 Pre-order Traversal
1 2 4 5 3 6 7 Pre-order Traversal
2 4 5 3 6 7 1 



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