Level Order ( Zigzag) can you tell me the mistake in code

[Vaibhav-Garg-1998823966894298 (Vaibhav Garg)]

import java.util.*;
public class Main {

static Scanner scn = new Scanner(System.in);

public static void main(String[] args) {
	Main m = new Main();
	BinaryTree bt = m.new BinaryTree();
	bt.levelOrderZZ();
}

private class BinaryTree {
	private class Node {
		int data;
		Node left;
		Node right;
	}

	private Node root;
	private int size;

	public BinaryTree() {
		this.root = this.takeInput(null, false);
	}

	public Node takeInput(Node parent, boolean ilc) {

		int cdata = scn.nextInt();
		Node child = new Node();
		child.data = cdata;
		this.size++;

		// left
		boolean hlc = scn.nextBoolean();

		if (hlc) {
			child.left = this.takeInput(child, true);
		}

		// right
		boolean hrc = scn.nextBoolean();

		if (hrc) {
			child.right = this.takeInput(child, false);
		}

		// return
		return child;
	}

	public void levelOrderZZ() {
		
		// write your code here
	}

}

}